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Joey's FAAB fantasy baseball waiver wire pickups and bidding guide for Week 4 (April 20 - April 26). His recommended FAAB dollars to spend on waiver wire adds.
Welcome, RotoBallers, to our Week 4 fantasy baseball FAAB waiver wire pickups for April 20th - April 26th. For anyone not familiar, this is a weekly series diving into the best fantasy baseball waiver wire targets each week for leagues that use FAAB (free agent acquisition budget) and our recommended dollar bid amounts for waivers.
This week, we will dive into 13 of the best waiver wire targets ahead of Week 4. All 13 players featured on this list are currently trending up in fantasy and are worth spending some of your remaining FAAB on. As a reminder, only players rostered in 45% or fewer of Yahoo! leagues will be listed.
So, let's dive into the best waiver wire pickups for Week 4 of the fantasy season.
Be sure to check all of our fantasy baseball lineup tools and resources:- BvP matchups data (Batter vs. Pitcher)
- PvB matchups data (Pitcher vs. Batter)
- Who should I start? Fantasy baseball comparisons
- Who should I pickup? Fantasy baseball comparisons
- Fantasy baseball trade analyzer
- MLB Props finder tool
- Fantasy baseball closer depth charts
Fantasy Baseball Waiver Wire Hitters to Target
Dillon Dingler, C, Detroit Tigers
35% rostered
FAAB Bid: ~10% if you need a catcher
Dillon Dingler is easily the best catcher waiver wire target this week. He has been hitting the ball well so far and projects nicely for the rest of the season. Dingler is currently slashing .268/.359/.536 with four home runs, three doubles, nine runs scored, and 14 RBI across 17 games. The Tigers catcher has also been red-hot at the plate recently, hitting .333 (9-for-27) with seven RBI over his last eight contests.
DESTROYED BY DING ‼️ pic.twitter.com/UZP5O7bi1p
— Detroit Tigers (@tigers) April 16, 2026
That makes Dingler a prime waiver target in all formats. He appears to be breaking out in his third Major League season and has some serious fantasy upside throughout the 2026 season. The 27-year-old currently ranks in the top 5% of the league in xwOBA (.485), expected batting average (.345), expected slugging (.732), barrel rate (20.9%), and hard-hit rate (60.5%).
Moises Ballesteros, C, Chicago Cubs
10% rostered
FAAB Bid: ~6-8%
Chicago Cubs rookie Moises Ballesteros has been on an offensive tear since the beginning of last week. He is hitting an absurd .600 (12-for-20) with three home runs and eight RBI over his last eight games. Considering Ballesteros is locked in as the Cubs everyday designated hitter against right-handed pitching, he's worth grabbing in 12-team leagues.
Ballesteros has the tools to be a consistent hitter in his first full season in the big leagues. His bat speed (74.3 mph) ranks toward the top of the league, and his early-season metrics suggest a breakout campaign could be in store. The 22-year-old has a .525 expected slugging, a 93.8 mph average exit velocity, a 16.7% barrel rate, and a 60% hard-hit rate. Even though he won't start against southpaws, he's still worth adding in leagues.
Jeremiah Jackson, 2B/3B/OF, Baltimore Orioles
44% rostered
FAAB Bid: ~10-12%
Baltimore Orioles second baseman Jeremiah Jackson has been the most-added fantasy player dating back to last weekend. He has really come on strong over the past week and simply can't be stopped at the plate right now. Jackson is batting .406 with five home runs, two doubles, and 13 RBI across his last eight games. Those strong numbers firmly make Jackson a top waiver wire target heading into Week 4.
While there are some concerns about Jackson's long-term fantasy value once Jackson Holliday (wrist) returns, managers shouldn't worry too much about that. If Jackson continues to hit the ball well, the Orioles will find a spot for him one way or another. Considering he has a .275 expected batting average, an 11.6% barrel rate, and a 73.5 mph bat speed, the 26-year-old is a post-hype breakout candidate this season.
Ildemaro Vargas, 1B/2B, Arizona Diamondbacks
27% rostered
FAAB Bid: ~2-4%
Arizona Diamondbacks infielder Ildemaro Vargas is taking full advantage of his opportunity in the early going. With both Pavin Smith and Carlos Santana currently on the 10-day injured list, Vargas has become a sneaky waiver wire pickup. Since Santana went down with his adductor strain, the 34-year-old veteran is batting .341 with one home run, eight runs scored, and six RBIs across 10 games.
As long as both Smith and Santana are out, Vargas is going to see consistent at-bats in Arizona's lineup. Spending around 2-4% of your remaining FAAB on the 10-year veteran is ideal. He currently ranks in the 92nd percentile in xwOBA (.399), 100th percentile in expected batting average (.372), 94th percentile in launch angle sweet-spot rate (45%), and 87th percentile in expected slugging (.524).
Xander Bogaerts, SS, San Diego Padres
38% rostered
FAAB Bid: ~5%
San Diego Padres shortstop Xander Bogaerts has really heated up at the plate after a slow start. The 33-year-old is slashing .385/.455/.641 with three home runs, 10 RBI, and two stolen bases over his last 10 games, and his metrics are up across the board. His xwOBA (.375), expected batting average (.316), expected slugging (.494), and squared-up rate (29.3%) all rank toward the top of the league.
SLAM DIEGO MADNESS
XANDER BOGAERTS WALK-OFF GRAND SLAM 😤 pic.twitter.com/kKJ85kWnfP
— MLB (@MLB) April 10, 2026
That's why Bogaerts is a good waiver wire add in 12-plus team leagues. His early stats look promising, and fantasy managers might see more power from him this season than in the past two years. Bogaerts has a 7.8% barrel rate so far (up from both the 2023 and 2024 seasons). If he can hit upward of 15 home runs to go with 20+ stolen bases and a solid batting average, he can be a reliable all-around fantasy contributor.
Jorge Soler, OF, Los Angeles Angels
44% rostered
FAAB Bid: ~8-10% if you need HR numbers
Los Angeles Angels outfielder Jorge Soler is currently serving a four-game suspension for his role in a brawl last week. But that shouldn't matter much to those fantasy managers looking to pick him up ahead of Week 4 because his suspension will officially end on Saturday. That means he will not miss any games next week due to that suspension.
If you are in need of some power on your fantasy roster, Soler is the perfect target. He has already hit five home runs and driven in 18 runs across 18 games played, and his power numbers make him an ideal target in both roto and point leagues. While the 13-year veteran will have a low batting average throughout the year, he does have 30-homer potential. Soler currently ranks in the 85th percentile in barrel rate (14.6%).
Fantasy Baseball Waiver Wire Pitchers to Target
Mick Abel, SP, Minnesota Twins
21% rostered
FAAB Bid: ~10%
No one was looking to pick up Minnesota Twins pitcher Mick Abel after two rough appearances to begin the season. He allowed five runs across 3 1/3 relief innings on March 29 and then gave up four runs across four innings in his first start on April 4. However, Abel is now a top waiver wire target ahead of Week 4 following back-to-back dominant outings on the mound.
Abel has thrown 13 scoreless innings with 16 strikeouts over his last two starts. His chase rate (33.1%), whiff rate (28.8%), and strikeout rate (24.7%) have all improved, and he continues to get a lot of swing-and-miss on his fastball. The right-hander generated 15 whiffs on his four-seam fastball in his two most recent outings. That's enough reason to spend close to 10% of your remaining FAAB on the Twins pitcher.
Spencer Arrighetti, SP, Houston Astros
27% rostered
FAAB Bid: ~5%
The Houston Astros have dealt with a handful of injuries to their rotation this year. Hunter Brown, Tatsuya Imai, and Cristian Javier are all currently on the 15-day injured list. Those injuries led the Astros to call up Spencer Arrighetti earlier this week to start against the Colorado Rockies on Wednesday. In that start, Arrighetti threw six innings of one-run ball with 10 strikeouts.
The potential has always been there for the right-hander. Fantasy managers saw that in his rookie season in 2024 when he struck out 171 batters across 145 innings pitched. After an injury-riddled 2025 campaign, he could be here to stay. Although his latest start came against a poor Rockies offense, Arrighetti is worth a look in some 12-team leagues. His stuff looked good in his first start, with a 45.5% whiff rate and a 37% strikeout rate.
Reid Detmers, SP/RP, Los Angeles Angels
31% rostered
FAAB Bid: ~7-10%
Los Angeles Angels pitcher Reid Detmers spent the 2025 season in the bullpen. He struggled as a starter in 2024 (6.70 ERA), and the Angels wanted to see how his stuff would play in relief. The results in that role were encouraging, as the southpaw finished with a 3.96 ERA, a 33.9% chase rate, a 32.7% whiff rate, and a 30.1% strikeout rate. Detmers is now carrying over those metrics as a starter in 2026.
Reid Detmers, 3Ks in the 2nd.
5Ks thru 2 pic.twitter.com/8nCXa6USJN
— Rob Friedman (@PitchingNinja) March 28, 2026
The southpaw just threw seven innings of one-run ball with nine strikeouts against the New York Yankees on Tuesday. That marked the second time this season that Detmers has struck out nine batters in a start. Given that the Angels pitcher still has an elite chase rate (38.7%) and a solid whiff rate (30.2%), he should be on fantasy radars. He's an add in most 12-team leagues and in all 15-team leagues for Week 4.
Landen Roupp, SP, San Francisco Giants
28% rostered
FAAB Bid: ~7%
San Francisco Giants starting pitcher Landen Roupp posted solid numbers in his first season as a starter in 2025. He had a 3.80 ERA and 102 strikeouts across 106 2/3 innings pitched. Now, Roupp appears to be taking his game to the next level. The 27-year-old is off to a strong start on the mound in 2026, carrying a 2.38 ERA, a 0.971 WHIP, and 24 strikeouts across his first four starts.
Roupp has been a big surprise in the early going. He has allowed just one run in his last 12 innings of work, and both his breaking ball pitches and offspeed pitches have become game-changers on the mound. His Breaking Run Value currently ranks in the 99th percentile, and his Offspeed Run Value ranks in the 95th percentile. With an elite curveball and a dominant changeup, the Giants pitcher is an add in most leagues.
Joel Kuhnel, RP, Athletics
13% rostered
FAAB Bid: ~5% if you need saves
The Athletics have operated a closer-by-committee to start the 2026 season. Joel Kuhnel, Mark Leiter Jr., and Hogan Harris have all logged saves through the first few weeks. However, Kuhnel could be emerging as a favorite for this role after saving his third game in the team's win over the Texas Rangers on Wednesday.
It might be a slight headache to roster Kuhnel, knowing it isn't fully his job. However, he has been Mark Kotsay's preferred closer in two of the Athletics' last three save opportunities. The right-hander has yet to give up a run, issue a walk, or allow a barrel in 4 2/3 innings this season. If you are in need of some saves, Kuhnel is worth a look in some leagues.
Enyel De Los Santos, RP, Houston Astros
7% rostered
FAAB Bid: ~5% if you need saves
The Houston Astros entered the season with Bryan Abreu as their closer, but his early-season struggles have removed him from that role. Relief pitcher Enyel De Los Santos now looks to be the team's closer until Josh Hader returns. De Los Santos has saved each of the Astros' past two wins, which included a perfect ninth inning against the Rockies on Wednesday.
As a result, the right-hander is a nice waiver wire target for Week 4. He appears to be the team's closer right now and could thrive in this role with a .147 expected batting average against, a 4% walk rate, and a 0% barrel rate. Just don't overspend for De Los Santos because he is only a short-term closer option. Hader will return to being Houston's closer once he is fully healthy.
Bryan Baker, RP, Tampa Bay Rays
22% rostered
FAAB Bid: ~5-7% if you need saves
Tampa Bay Rays reliever Bryan Baker is racking up the saves in the early going. He already has four saves and is Tampa Bay's preferred closer option right now. Baker currently leads the team in saves (four) and save opportunities (five), which makes him the top closer to target on the waiver wire ahead of Week 4.
It remains to be seen if Baker will remain in this role once the Rays' bullpen is at full strength. For now, though, fantasy managers should ride with the 31-year-old in most leagues. He has a 35.1% chase rate, a 38.9% whiff rate, a 6.9% walk rate, and a 25% hard-hit rate and has allowed only three runs across 7 1/3 innings pitched this season.
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