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Path To MLB Innings Exists for Kade Anderson Following Trade Deadline
Seattle Mariners pitching prospect Kade Anderson has been lights-out all season long at Double-A Arkansas, and following the big-league club's trade of Luis Castillo at the deadline, there could be room for the talented left-hander in Seattle. Anderson has a 9-1 record this season with Arkansas and a 1.20 ERA and 0.66 WHIP. He also has 119 strikeouts in 82 1/3 innings for an extremely enticing strikeout rate. Anderson, now 22 years old, is the No. 1 prospect in the Mariners' system and boasts a 60-grade fastball and changeup with a 55-grade curveball and slider. Anderson looks like a great late-season stash in all fantasy leagues, and his upside is extremely high with his minimal ERA and WHIP coupled with his elite strikeout rate. The only question is whether the Mariners take a chance and call up Anderson to the big leagues.
Source: Minor League Baseball
Source: Minor League Baseball
Cole Young's Recent Hitting Streak has his Stock Trending Up
Seattle Mariners second baseman Cole Young had a recent eight-game hitting streak from July 26 through Aug. 2 that saw him go 15-for-34 (.441) with a home run, a double, two triples, three RBI, and six runs scored across 37 plate appearances. He capped it off with a 4-for-5 night against the Minnesota Twins on Aug. 2. Young has gone 0-for-9 with three walks in three games since losing his eight-game hitting streak, but the recent hot stretch had fantasy managers giving the 23-year-old a look off the waiver wire for middle-infield help in deeper leagues. The former 21st overall pick in the 2022 MLB draft is now hitting .263/.323/.412 with a .736 OPS, 14 home runs, 51 RBI, 54 runs scored, and three stolen bases across 116 games played and 465 plate appearances as a regular for the M's in his first full MLB season in 2026. Young has definitely taken a step forward in his second season in the big leagues, and he's quietly become a steady second base option in counting-stat leagues with improved power at the plate. And with a .280 expected batting average and .334 xwOBA, Young still has time to do more damage before his sophomore season comes to an end. He's rostered in only 21% of Yahoo leagues.
Source: Baseball Reference
Source: Baseball Reference
Michael Arroyo a Higher-End Stash Amid Triple-A Surge
Seattle Mariners infield/outfield prospect Michael Arroyo continues to impress at Triple-A Tacoma, producing four multi-hit performances in his last six games for the Rainiers and drawing more walks and hit-by-pitches (five) than strikeouts (four) during that time. In all, the 5-foot-10 Colombian is hitting .337 with a .921 OPS through 22 games since his promotion to Triple-A. The Mariners' fourth-ranked prospect began the season at Double-A, and his ability to compete at the minors' highest level along with his positional versatility (2B, OF) could earn him a late-season debut in the majors, too. With solid contact and power along with an ability to steal bases, the 21-year-old has the makings of a potential multi-category contributor for fantasy, so the right-handed hitter should be considered a high-end stash option in deeper 12+ team leagues.
Source: MiLB.com
Source: MiLB.com
Kade Anderson Will Work as a Starter Once Called Up
Seattle Mariners President of Baseball Operations Jerry Dipoto said that top pitching prospect Kade Anderson will be part of the team's starting rotation once he's called up to the big leagues, per Adam Jude of The Seattle Times. Jude reports that Anderson is expected to be promoted from Double-A Arkansas "in the coming weeks." Anderson is widely considered to be one of the top prospects in all of baseball and has put together a dominant season in the minor leagues. Across 82 2/3 innings (16 starts), the young left-hander has recorded a 9-1 record with a 1.20 ERA, 0.66 WHIP, and 119 strikeouts. He's posted an absurd 40.5% strikeout rate with just a 4.1% walk rate. Once Anderson gets called up, he offers serious upside for fantasy managers.
Source: The Seattle Times - Adam Jude
Source: The Seattle Times - Adam Jude
Luke Raley Expected to Miss the Rest of the Season
Seattle Mariners general manager Justin Hollander said that first baseman/outfielder Luke Raley (forearm) is not expected to play again this year after going on the 10-day injured list with a strained left forearm, according to Adam Jude of The Seattle Times. Raley landed on the IL over the weekend, but he had been battling through his forearm injury for weeks. The Mariners are not ruling out surgery for the 31-year-old left-handed hitter. Raley will finish his sixth year in the big leagues (third with Seattle) in 2026 with a .225/.284/.439 slash line, a .723 OPS, 15 home runs, 39 RBI, 28 runs scored, and a stolen base in 95 games across 287 plate appearances. It's a notable loss of power for the M's lineup, but Seattle is hoping their trade-deadline acquisition of Taylor Ward will help make up for the loss of Raley. Raley will be a free agent this winter after signing a one-year, $2.05 million deal with the Mariners back in January, and it's unclear if the organization has any interest in bringing him back.
Source: The Seattle Times - Adam Jude
Source: The Seattle Times - Adam Jude
Kade Anderson a Prime Stash Option with Path to MLB Opportunities
Seattle Mariners pitching prospect Kade Anderson has thus far lived up to his draft-day billing as one of the top arms in the class after getting drafted third overall in 2025. The former first-rounder has perhaps even exceeded those lefty expectations with a downright dominant first season in professional ball at Double-A Arkansas. The southpaw has yielded zero runs in 11 of his 16 starts, and two runs or fewer in all but one start, resulting in a masterful 1.20 ERA (1.90 FIP), 0.66 WHIP, and a 36.4 percent K-BB%, all of which are the best in the minors out of all pitchers with at least 60 innings pitched. With the Mariners dealing Luis Castillo at the deadline, there is one less rotation option to compete with, and the team's general manager, Justin Hollander, even stated that Anderson is "definitely in the mix" for a rotation spot, so an MLB debut could be coming later this season. Despite not having pitched at Triple-A at all yet, the Mariners' top-ranked prospect should be considered one of the top pitchers to stash for fantasy in hopes he can help fantasy managers down the stretch.
Source: Shannon Drayer
Source: Shannon Drayer
Brendan Donovan Activated on Tuesday
Seattle Mariners utility man Brendan Donovan (groin) was activated from the injured list on Tuesday, per Daniel Kramer of MLB.com. Donovan started at third base and batted seventh in his first game back against the Detroit Tigers. The 29-year-old has missed most of the 2026 season due to groin injuries. After initial hitting the injured list in mid-April, Donovan returned in early May before promptly going back on the IL in mid-May. Across 101 plate appearances on the year, Donovan is hitting .274/.386/.452 with three home runs, eight RBI, and nine runs scored. The lefty swinger is unlikely to provide much pop or speed, but he's an above-average source of batting average whose ability to get on base should keep him in the lineup and help him rack up counting stats. In deeper leagues Donovan is worth targeting on the waiver wire as quality roster depth.
Source: MLB.com - Daniel Kramer
Source: MLB.com - Daniel Kramer
Lazaro Montes Offers Unique Power Upside For Young Prospect
Seattle Mariners outfield prospect Lazaro Montes is having a great minor-league season between Double-A Arkansas and Triple-A Tacoma, hitting for massive power, with 28 homers combined between the two levels to go with 74 RBI and 78 runs scored. He is hitting .238 between both clubs but has been better at Tacoma with a .253 average. He was called up to Tacoma on July 7 and has three homers and eight RBI in 83 at-bats since. Montes is the No. 4 prospect in the Mariners' system and has 65-grade power, which is a massive power upside for a prospect. At age 21, Montes might still need a bit of time to develop in the minors, and we are seeing that right now with him at Triple-A. A dynasty league asset, Montes could be left on the waiver wire in redraft leagues unless a fantasy manager wants to take a big gamble on a stash.
Source: Minor League Baseball
Source: Minor League Baseball
Kade Anderson "Definitely in the Mix" for a Rotation Spot
Seattle Mariners general manager Justin Hollander said on Seattle Sports that left-handed pitching prospect Kade Anderson is "definitely in the mix" for a starting-rotation spot at the big-league level, according to Shannon Drayer. Anderson was seventh on the starting depth chart, but after the M's traded veteran right-hander Luis Castillo over the weekend, he's now sixth. Seattle will sit down this week to map out a plan "that makes the most sense for him to impact the big-league team if there is a spot for him to do so." The 22-year-old former third overall pick in 2025 from LSU is the Mariners' top prospect and the No. 5 overall prospect in baseball, per MLB Pipeline, and the odds of him making his major-league debut in August seem increasingly likely. Anderson has looked amazing in 16 starts (82 1/3 innings) at Double-A Arkansas, going 9-1 with a 1.20 ERA, 0.66 WHIP, and 119:12 K:BB. He's already rostered in 22% of Yahoo leagues and could help fantasy managers in mixed leagues to close out the year if he earns a rotation spot in Seattle.
Source: Shannon Drayer
Source: Shannon Drayer
Mariners Land Taylor Ward in Trade With the Orioles
The Seattle Mariners are acquiring outfielder Taylor Ward from the Baltimore Orioles on Monday in exchange for right-handers Alex Hoppe, Harrison Kreiling, and Brock Moore, a source told Jake Rill of MLB.com. Ward will return to the American League West and give the Mariners some much-needed pop from the right side of the plate as they seek a return to the postseason in 2026. The 32-year-old veteran outfielder hit .246/.383/.346 with a .730 OPS, only seven home runs, 30 RBI, 64 runs scored, four stolen bases, and a league-high 87 walks in 111 games and a league-high 506 plate appearances in his lone season in Baltimore before being dealt. Ward is as patient as they come at the dish (perhaps too patient), and he's been a massive bust for fantasy managers this year after clubbing a career-high 36 home runs and driving in 103 runs in 157 games with the Los Angeles Angels in 2025. The M's are banking on positive regression in the slugging department for Ward in his return to the AL West. Ward's fantasy baseball value shouldn't change all that much with the move to Seattle and pitcher-friendly T-Mobile Park.
Source: MLB.com - Jake Rill
Source: MLB.com - Jake Rill
Mariners Acquire Catching Prospect Boston Smith From the White Sox
The Seattle Mariners acquired catching prospect Boston Smith, right-handed reliever Seranthony Dominguez, and outfielder Nolan Jones from the Chicago White Sox on Saturday in exchange for veteran right-hander Luis Castillo, sources told Jeff Passan of ESPN. The 23-year-old Smith will immediately become Seattle's No. 14 prospect, per MLB Pipeline. He heads to the American League West after slashing .291/.450/.589 with a 1.038 OPS, 22 home runs, 58 RBI, 10 stolen bases, and 68 runs scored in 79 games across 347 plate appearances with Single-A Kannapolis, High-A Winston-Salem, and Double-A Birmingham this year. Smith was originally drafted in the sixth round by the Washington Nationals out of Wright State University before they sent him to Chicago in the Curtis Mead trade in March. The 5-foot-10, 195-pounder can also play the outfield, and he has an uppercut left-handed swing that takes full advantage of his power to the pull side. Smith is an above-average athlete, but he still needs work on defense, and strikeouts could be an issue as he works his way closer to the big leagues.
Source: ESPN.com - Jeff Passan
Source: ESPN.com - Jeff Passan
Seranthony Dominguez Traded to the Mariners
The Chicago White Sox traded reliever Seranthony Dominguez, outfielder Nolan Jones, and catcher Boston Smith to the Seattle Mariners in exchange for right-hander Luis Castillo, according to Jeff Passan of ESPN. Dominguez signed a two-year, $20 million contract with the White Sox this offseason to be the team's closer. He struggled as the team's closer earlier in the season, converting just 12 of 17 save opportunities and eventually lost the job to Grant Taylor and Sean Newcomb in June. The 31-year-old owns a 3.99 ERA, 1.33 WHIP, and 47 strikeouts across 38 1/3 innings. With Andres Munoz locked in as Seattle's closer, Dominguez will be used mostly in leverage situations. Fantasy managers can move on from Dominguez outside leagues that reward saves and holds, as he is third in the pecking order for save chances behind Munoz and Jose A. Ferrer.
Source: Jeff Passan of ESPN
Source: Jeff Passan of ESPN
Kade Anderson has Path to MLB Innings Following Major Trade
Seattle Mariners top pitching prospect Kade Anderson should be on the radar of all fantasy managers heading into Week 19. On Saturday, the Mariners traded veteran right-handed pitcher Luis Castillo to the Chicago White Sox per ESPN's Jeff Passan. This move opens a role in their starting rotation for a potential sixth man. While Emerson Hancock currently occupies the No. 5 spot in the rotation, he has also been linked to many trade rumors, which would create an even clearer path for the team's No. 1 prospect to play a major role over the final stretch. Anderson has been knocking on the MLB door since making his pro debut in 2026. Through his first 16 starts at Double-A (82 1/3 innings), the southpaw has posted a dominant 1.20 ERA, 0.66 WHIP, and a 119:12 K:BB. Even if the Mariners were to hold Hancock through the deadline, Anderson could find a role as a sixth man in the staff. If Hancock were to move to a new club, the budding southpaw could earn the call immediately after. He is a priority stash target across all formats as he would hold must-start upside on a per-start basis.
Source: Jeff Passan
Source: Jeff Passan
Mariners Listening to Offers on Randy Arozarena
The Seattle Mariners are listening to offers for outfielder Randy Arozarena, according to Adam Jude and Ryan Divish of the Seattle Times. Arozarena is set to be a free agent at the end of the season, and trade talks are expected to "intensify" leading up to the MLB trade deadline on August 3. Seattle is also listening to offers for pitchers George Kirby, Emerson Hancock, and Luis Castillo. The Mariners are sellers and are expected to move Arozarena by the deadline. He has been hitting well over his last 12 games, slashing .277/.358/.426 with three home runs, five RBI, eight runs, and a stolen base. Overall, the 31-year-old is slashing .280/.375/.447 with 13 homers and 20 steals over 440 plate appearances this season. Arozarena's fantasy value could take a bump if he gets moved to a better offense. Still, regardless of where the veteran is traded to, he should continue to be a multi-category contributor for fantasy managers.
Source: Seattle Times
Source: Seattle Times
George Kirby Could Be Moved Before the Trade Deadline
Seattle Mariners right-hander George Kirby could be moved before the August 3 trade deadline, according to Jeff Passan of ESPN. Multiple teams have engaged the Mariners on a potential deal for Kirby. The Mariners are also listening to offers for starters Emerson Hancock and Luis Castillo. Kirby owns a 3.98 ERA, 1.30 WHIP, and 107 strikeouts across 120 innings. The 28-year-old was rocked for seven earned runs, serving up four long balls across just four innings in his last start on Monday. Before that start, Kirby posted a 1.73 ERA in his previous four starts before Monday's implosion. His fantasy value might change a little if he's traded but should remain a viable starter regardless of where he lands. Kirby is scheduled to start on Sunday against the Twins, but the Mariners could hold him back until after the MLB deadline. Stay tuned.
Source: Jeff Passan of ESPN
Source: Jeff Passan of ESPN
