Mike's fantasy baseball waiver wire hitters to add as category boosters for Week 21 of 2025. His top hitters to pick up or stream for HR, RBI, SB, AVG, and runs.

Welcome back to our F antasy Baseball Waiver Wire Hitters - Category Boosters column for Week 21 of the 2025 MLB season. We are in the thick of it now, and seasons can be won or lost with our waiver wire additions.

As we prepare our teams for the stretch run to the playoffs, what do you need to get from the waiver wire to secure our spots? Do you need more home runs and steals? Do you need batting average help? We have you covered every week in this article.

We will aim to give you three options for each of the five offensive categories in a standard five-by-five league. Our rule: All hitters will be listed according to t

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