Kevin Luo's top hitter fantasy baseball prospects to stash for Week 21 (2025). His MLB prospects to pick up and stash on your bench and N/A spots in redraft leagues.

It's August 15, which means that we're 45 days away from the end of the MLB regular season. Teams can now call up their top prospects while maintaining their prospect eligibility going into next season (presuming they don't allow them to go over the at-bats or innings pitched threshold).

I expect (and am hopeful) that we'll get a decent number of call-ups this weekend to add some juice to fantasy baseball for the stretch run of the season.

Let's look at a few top prospects to stash for Week 21 of the fantasy baseball season. Be sure to check all of our fantasy baseball lineup tools and resources:

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