Eric Cross' top fantasy baseball waiver wire adds for Week 21 of 2025 (August 18 - August 24). His favorite free agent hitters and pitchers under 40% rostered.

We've reached the point in the season where the word "grind" takes on extra meaning. We've been setting lineups, making trades, and scouring the waiver wire for nearly five months now, and fantasy football has crept into the picture for some of you. But staying diligent with your teams and staying on top of the waiver wire is just as important now as it was in April and May.

The players below are all under 40 percent rostered in Yahoo! leagues. Some of them might already be rostered in your leagues, but if they're available, I'd recommend considering them to see if they could be good fits for your fantasy teams.

Last week's recom

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