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Chris Clegg's dynasty fantasy baseball buy lows, sell highs, and MLB news for Week 13 (2025). Notable prospects debuts and dynasty risers/fallers including Cam Smith and Andrew Abbott.
Welcome back, RotoBallers, to my dynasty fantasy baseball risers, fallers, and buys/sells for Week 13 of the 2025 MLB season. As June comes to a close, sample sizes have begun to stabilize, and there is less noise in the samples. Prospects are getting the call to majors, and there is plenty to discuss.
Today's dynasty article will look at recent prospect call-ups like Jacob Misiorowski, Brady House, and Didier Fuentes, along with several other dynasty-related news items. This bi-weekly series will examine various prospects and dynasty news and discuss fantasy implications. If you enjoy dynasty baseball, you know it is a fast-paced game. Keeping up with current events can help you stay ahead of your league mates.
Call-ups, trends, and buying and selling players are all just small pieces to help you stay ahead. So, that's what we will do in this article each week: break down everything you need to know to be successful in dynasty. At the end of the day, we all want to build a dynasty team that sustains and lasts for the long haul. I am here to help you do so. So, what do you need to know for dynasty leagues in Week 13 of the 2025 season? Let's dive in.
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Recent MLB Prospect Call-Ups
Jacob Misiorowski's MLB debut has been one of the better ones in recent memory. Through two starts and 11 innings of work, Misiorowski has allowed just two earned runs and struck out 29 percent of batters faced. He has overpowered everyone he has faced. This follows a strong 63 innings in Triple-A in which he posted a 2.13 ERA with a 31.6 percent strikeout rate.
Misiorowski broke fastball traits earlier this year on the Hawkeye machine as he threw 103 mph. While that is rare to see, what is even crazier is the pitch metrics. He created a -3.05 VAA on the pitch and 13.2 inches of iVB from a 5-foot-2 release height. It had 7-foot-6 of extension on it as well, creating a perceived velocity of 105.4 mph. Good luck, hitters.
The fastball routinely gets to triple digits, and the ride he creates on the pitch from the release point is absurd. It is such a unique look, on top of the fact that it has high velocity.
His best swing-and-miss secondary pitch is the mid-80s curveball. The curveball sits at 85 mph with good depth and five to six inches of sweep. Misiorowski's slider/cutter sits 92-93 mph and has touched 96. The pitch has some carry and an inch or two of horizontal movement. He even throws a 90 mph changeup.
The command is still in question, but Misiorowski can shove. Even if he does live in the 12-13 percent walk rate range in the majors, he is going to have a ton of success. He should be rostered in every league.
Brady House hit his way to the majors and got a well-deserved call-up to Washington. While the numbers don't look great, House still has six hits in his first seven games, and while all singles, it has still been encouraging to see.
House hung out in the minors for what seemed like an eternity at times, but he just turned 22 years old. He improved nearly every facet of his game this year, and the injury bug seems to be behind him at this point.
In the minors, House had results. His .304/.353/.519 slash is backed by good underlying data. The ground-ball rate of 47 percent is still an issue, and he needs to show improvements in sweet-spot rate, meaning he will need to hit the ball at ideal launch angles more often.
House has always hit the ball hard, so it is not a surprise to see the impressive hard-hit rate of 45 percent, but his 109 mph 90th percentile exit velocity and 90 mph average exit velocity stand out. Despite the groundballs, House still hits the ball hard often enough to run a barrel rate north of ten percent.
The approach has been cleaned up a bit. Last year, House chased around 40 percent of pitches he saw out of the zone. This year, that number has dropped to 34 percent, and House is showing more aggression on pitches in the zone.
House still has talent, and if he can show just an average approach and contact skills, there are 30 home runs in the bat with a solid glove at third base.
Didier Fuentes was one of the more surprising call-ups in the last several weeks, but if you follow the Braves and their aggression, it was not surprising. Fuentes began the year in High-A Rome and quickly moved to Double-A, even with struggles on the surface. After one start in Triple-A, Fuentes got the call to the majors.
Fuentes got a soft landing spot with Miami, and even though he allowed four earned runs and gave up a big homer, he showed good flashes for someone who just turned 20 years old. The Stuff+ was off the charts as Fuentes posted a 117 fastball stuff+ and 113 overall.
Fuentes is an impressive strike thrower for his age, posting a mark near 67 percent last year, which fell to an above-average 64 percent this year. He walked just seven percent of batters faced, while also missing bats. Locations are good, and Fuentes has induced weak contact.
The four-seam is sitting 95 mph and topping at 99 mph with 16 inches of IVB from a 5-foot release height. The pitch has one of the flattest VAs in baseball and is a compelling bat-missing pitch.
It is still a fastball-heavy approach, but he did add a new curveball this year with good depth and sweep. There is a gyro-slider in the profile that he did not throw much in his pro debut, which has more carry and sits in the mid-80s, a pitch he is likely to unveil more over time. The splitter is rarely used, but has solid traits.
Fuentes has a ton of upside, but as a young 20-year-old, there are likely to be struggles.
19-year-old @Braves prospect Didier Fuentes claims the #SpringBreakout strikeout lead in dominant fashion 💎
3 IP | 1 H | 0 R | 0 BB | 7 K pic.twitter.com/5D1ZeSejBF
— MLB Pipeline (@MLBPipeline) March 16, 2025
Dynasty Trends: Chase Rate and Fantasy Performances
Pete Crow-Armstrong's insane performance with his astronomically high chase rate has me thinking, how much does chase rate correlate with fantasy performance? We will use Razzball's Player Rater and look at the players with the highest and lowest chase rates.
Highest Chase Rates
| Player | 2025 Chase% | 2025 Fantasy Rank |
| Pete Crow-Armstrong | 44.7 | 4 |
| Salvador Perez | 43.8 | 230 |
| Yainer Diaz | 43.5 | 228 |
| Ceddanne Rafaela | 43.1 | 131 |
| Michael Harris II | 41.7 | 256 |
| Jackson Chourio | 40 | 34 |
| Gabriel Arias | 40 | 356 |
| Luis Garcia | 38.2 | 136 |
| Nick Castellanos | 38.2 | 113 |
| Jose Altuve | 38.1 | 104 |
Lowest Chase Rate
| Player | 2025 Chase% | 2025 Fantasy Rank |
| Juan Soto | 14.3 | 37 |
| Gleyber Torres | 16.6 | 134 |
| Trent Grisham | 16.9 | 150 |
| Kyle Tucker | 17.4 | 9 |
| TJ Friedl | 18.4 | 76 |
| Matt Chapman | 18.5 | 143 |
| Gavin Lux | 18.9 | 331 |
| Geraldo Perdomo | 18.9 | 66 |
| Rhys Hoskins | 19 | 169 |
| Max Muncy | 19.5 | 128 |
There is no clear correlation between chase rate and fantasy rank. I think chasing at high clips does make it harder to perform, but making good in-zone contact and making the most of each batted ball is essential.
While Crow-Armstrong has the worst chase rate in baseball, his 14.2 percent barrel rate makes up for that. While Gavin Lux has a low chase rate, his 4.2 percent barrel rate limits his upside.
Andrew Abbott, Filthy 83mph Sweeper...and Sword. ⚔️ pic.twitter.com/ky9Wez1KjT
— Rob Friedman (@PitchingNinja) May 18, 2025
Fantasy Baseball Dynasty Buys and Sells
Andrew Abbott is a prime candidate for me to sell high at this point. Through 75 1/3 innings this year, Abbott has a 1.79 ERA and a 0.96 WHIP with an impressive 7-1 record. If you are looking for someone who cares about surface numbers, like that, he could sell for a solid return.
Abbott has struck out just 24 percent of batters faced, which is a solid increase from the 19.5 percent rate he had last season. The walk rate has also improved at 6.8 percent. While the strike rate and zone percentage of his fastball have improved, it is just a slight increase in usage.
For someone who allows as many flyballs as Abbott does, it is amazing he has allowed just eight home runs this year. Last year, that number was 25, and it seems like it could rise this season. Sure, Abbott has limited hard contact, but the nine percent barrel rate means that as it is heating up, more balls are going to leave the yard.
The whiff rate on all Abbott's pitches is average outside of the curveball, which has a whiff rate of 31.8 percent. The strikeout rate could remain at 24 percent, but there is likely to be a significant regression in the ratios.
Andrew Abbott, Filthy 83mph Sweeper...and Sword. ⚔️ pic.twitter.com/ky9Wez1KjT
— Rob Friedman (@PitchingNinja) May 18, 2025
Cam Smith has quietly been putting it together after an aggressive assignment and a slow start to his season. Smith made the Astros roster out of spring training and showed a lot of struggles early on. There were flashes as Smith had a two-home run game on April 18, but otherwise, there were struggles.
Since May 23, Smith has had 104 plate appearances and is slashing .299/.346/.454 with 11 extra base hits. Over that span, he has a 114 mph max exit velocity and a 93.7 mph average exit velocity. The hard-hit rate of 59 percent also stands out in a big way.
Smith's zone contact rate has also taken a massive leap to 90.5 percent, and he pairs it with an 80 percent overall contact rate. Sure, the chase rate is still a little high at 33 percent, but everything else has been so good.
Smith is turning the corner, and it is time to buy. We know the skill set is there, and the Astros have stuck by him through the struggles. They are soon to be rewarded.
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