Week 5 of the 2025 fantasy baseball season brings an intriguing slate of pitchers offering two starts, with key streamers available for managers looking to optimize their rosters. Among those over 50% rostered, Garrett Crochet and Jack Flaherty are solid options, while Gavin Williams and Reese Olson emerge as must-add streamers for their favorable matchups against struggling offenses.

Gavin Williams, despite previous challenges, has shown promise with a recent uptick in velocity and the return of his cutter, positioning him well against two bottom-tier offenses. Olson, fresh off a brilliant performance against the Padres, has also improved his pitch selection, making him a strong streaming candidate. Meanwhile, Andrew Heaney and David Peterson present riskier options due to their high strikeout potential, but also concerning underlying metrics. This week is pivotal for fantasy managers, and selecting the right pitchers could define the overall success of their teams.