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August 18, 2025
Fantasy Baseball Risers and Fallers for Week 21 (2025) | Fantasy News
Connelly Doan
Rotoballer
Fantasy Baseball Risers and Fallers for Week 21 (2025) | Fantasy News

Jakob Marsee’s August call-up with the Marlins has fantasy managers buzzing as he slashes .353/.450/.706 with 3 homers, 13 RBI and 6 steals through a small sample. Max Scherzer, at 41, has re-emerged in Toronto with four straight quality starts, pairing a solid 3.83 ERA and high strikeout rate behind a heavy slider usage. Kyle Tucker’s second-half lull with the Cubs—low BABIP, soft power metrics, and steady walk rates—keeps him on a fine line between sell-high and hold. Seth Lugo, meanwhile, has stumbled in the second half for Kansas City with increased walks and HR trouble, forcing a wait-and-see approach. The Sabermetrics and Statcast write-ups reinforce why small sample signals can mislead but also why steady underlying metrics still matter for late-season rosters.

Which riser from the Week 21 article should fantasy managers prioritize for the final stretch?What metrics should you monitor to separate small-sample Marsee hype from real value?Would you start Scherzer in any matchup or stream around him?How should Tucker’s second-half slump influence your Cubs asset strategy?
Mentions:
Chicago Cubs | MLB
Chicago Cubs | MLB
@Jakob Marsee | Miami Marlins | MLB
@Jakob Marsee | Miami Marlins | MLB
Kansas City Royals | MLB
Kansas City Royals | MLB
@Kyle Tucker | Chicago Cubs | MLB
@Kyle Tucker | Chicago Cubs | MLB
@Max Scherzer | Toronto Blue Jays | MLB
@Max Scherzer | Toronto Blue Jays | MLB
Miami Marlins | MLB
Miami Marlins | MLB
@Seth Lugo | Kansas City Royals | MLB
@Seth Lugo | Kansas City Royals | MLB
Toronto Blue Jays | MLB
Toronto Blue Jays | MLB

https://www.rotoballer.com/fantasy-baseball-risers..

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