As the MLB season progresses, streaming options on the waiver wire become essential for fantasy baseball managers looking to bolster their rotation. Here are ten pitchers, all rostered in under 80% of CBS Sports leagues, to consider for Week 12 (June 9-15). These pitchers could provide significant value, especially in two-start scenarios.

Eury Pérez returns from Tommy John surgery, facing the Pirates and Nationals in his first week back, presenting solid matchup potential. Jack Leiter, contingent upon the Rangers' rotation adjustments, offers a strong ERA but faces uncertainty in his second start.

Griffin Canning has been effective lately, although his high walk rate raises concerns. Zebby Matthews is gaining trust within the Twins' rotation and faces manageable lineups. Meanwhile, Hayden Birdsong’s performances suggest he could thrive at Coors Field against a struggling Rockies offense.

Jeffrey Springs and Luis Ortiz also make the list, each with favorable matchups that could lead to quality starts. Mitch Keller's recent struggles somewhat mitigate his streaming appeal, but he remains a candidate. Finally, Clarke Schmidt benefits from two starts, one against a weak Royals lineup. Each of these pitchers presents varying levels of risk and upside for managers looking to maximize their pitching stats this week.