MLB Prospect News: Robert Hassell Called Up, Christian Moore Promoted and More

A couple days ago, I did an MLB prospect roundup, and there's enough news again today to do another article.

We'll take a look at three prospects in this story.

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Robert Hassell III Called Up

Washington is calling up Hassell for what will be his MLB debut.

He was the eighth overall pick in the 2020 MLB Draft, and he was once viewed as one of the top prospects in the game. Hassell was part of the Juan Soto trade from Washington to San Diego.

The 23-year-old outfielder fell off prospect ranking lists after some struggles in the minor leagues, but he's still ranked 11th for Washington. He has a 50 grade for hitting, 40 for his power, 60 in running, a 55-graded arm and fielder. Hassell is a 45 overall still.

He was good in his first two minor league seasons. Hassell hit .302 and got on base at a .393 clip in 2021, then had a .273 average and .357 OBP in 2022.

Hassell dropped to a .221 average and .324 OBP in 2023 before posting a .241 average and .319 OBP in 2024. This season, he has been raking at Triple-A, and he made a case to make the team out of spring training.

He has a .288 average and .337 OBP this season across 43 AAA games. Hassell has 47 total hits, including seven doubles and four home runs. He also has 24 RBIs, nine stolen bases, 19 runs scored, 12 walks and 34 strikeouts.

Washington is dealing with injuries to outfielders Dylan Crews and Jacob Young, so one of them is likely hitting the injured list, which will open playing time for Hassell. The left-handed hitter should fill in at center or right field.

Hassell is rostered in 3% of fantasy leagues right now, and that should grow after he's officially called up and gets put in the lineup. He will open as a fantasy option in deeper redraft leagues, but could see his own percentage skyrocket if he excels early on.

The long-term health of Crews and Young will tell us more about Hassell's long-term fantasy potential. If Hassell hits at the big league level though, Washington is going to have a hard time sending him back down. He could eventually replace Alex Call, who started the season strong but is fading as time passes.

With Hassell being a former highly-regarded prospect, I'd say all fantasy owners need to keep tabs on him as he makes his MLB debut. There's a chance he continues raking at the big league level and is the long-term fantasy stud he was supposed to be a few seasons ago.

I'd add and stash him in deeper redraft leagues, just in case he takes off. Him racking up some hits early on should get him added in more leagues, and he could be rostered in most deeper redraft leagues in a hurry, so keep very close tabs on the youngster.

It'd maybe take a week or two of strong results for Hassell to get standard league attention, so really all fantasy owners need to be monitoring him.

Christian Moore Promoted 

Moore is the No. 60 prospect in all of baseball, and is the Angels' top prospect. He started this season at Double-A, but got promoted and played in a Triple-A game on Tuesday.

He was the No. 8 overall pick in the 2024 MLB Draft. The 22-year-old second baseman has a 2025 ETA, and the Angels love to speed their top-end prospects through the minor leagues.

Moore has a 55 overall grade. His top tool is his power, graded as a 60. He's got a 55 mark in hitting, then 50 marks for running, fielding and his arm.

He hit .347 and got on base at a .400 clip across 25 minor league games last summer. Moore played at Single-A and Double-A, then started this season at AA again.

Moore hit just .234 and got on base at a .342 clip across 34 games this season, but the Angels apparently saw enough to promote him. In his first Triple-A game last night, Moore went 3-for-4, walked once, drove in two runs and struck out once, so LA knew what it was doing I guess.

Moore might not stick in Triple-A very long, especially if he keeps raking at the plate. There's a chance he gets called up to the big leagues for the All-Star break. I'd be shocked if he's not up before September, but he'll definitely be a late-season call up, if he's not injured.

Kyren Paris has played the most games at second base for the Angels this season. He started the season red hot, but has fallen off completely. Paris is way down to 9% rostered in fantasy leagues.

Luis Rengifo has gotten the second-most appearances at second base. He's struggled as well this season. Tim Anderson has also gotten time at 2B, but he too has been bad at the plate.

Veteran Kevin Newman has made a couple appearances at second base, but the Angels won't slow Moore down to keep Newman rostered.

If Moore keeps hitting and showing the team what he needs to, the Angels aren't going to have much issue bringing him up. They'll clear a roster spot for him in a heartbeat, so Moore is definitely a name to track.

Moore is already rostered in 3% of leagues synced here at FantasySP. He's got the most value in dynasty/keeper leagues, but he's getting redraft attention as well, and that own percentage should grow now that he's in Triple-A.

Moore will be a massive waiver wire pickup when he gets promoted to the big leagues. He's worth keeping tabs on moving forward, as I think it's only a matter of time before he's called up.

Rangers Sign Two-Way Player

Texas signed Seong-Jun Kim to an international free agent contract this week. 

Kim plays shortstop and is a right-handed pitcher. He's currently in high school and will graduate early in 2026.

He slots in as the team's No. 15 prospect immediately after signing. Kim is graded as a 45 overall as a hitter and pitcher, so scouts don't know if he'll gravitate one way, or be able to stick as a two-way player.

His hitting grades are: 60 arm, 55 fielding, 50 hitting and running and 45 power. His pitching grades are: 55 fastball, 50 splitter, slider and control and 45 curveball.

It's always fun when a prospect is a two-way player. Everyone of course is hoping he becomes the next Shohei Ohtani.

While that's highly unlikely, being able to hit and pitch gives him a better chance of making the big leagues in one of those areas. One would also think that a bigger emphasis on just hitting or pitching would help Kim maximize his potential in that area.

He's just 18 years old, and will need multiple years of minor league seasoning before he's ready to play in the big leagues. So he's just a dynasty/keeper fantasy asset right now, and only one to roster in deeper setups there.

Kim is definitely an intriguing prospect though, and he'll be fun to track over the course of his career. Right now, the MLB sets his ETA at 2030. We'll see if he can move that up as the years pass.