Eric Cross' top fantasy baseball waiver wire adds for Week 20 of 2025 (August 11 - August 17). His favorite free agent hitters and pitchers under 40% rostered.

Just like that, we've blown past the two-thirds mark of the 2025 Major League season and have under two months remaining in the regular season. For those of you in head-to-head formats, that probably means your playoffs start in four or five weeks. It's now crunch time of the fantasy baseball season, and time is running out to make your team better for the playoff or championship push.

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.

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