In Week 12 of fantasy baseball, five pitchers are showing breakout potential: Framber Valdez, Jacob deGrom, Robbie Ray, Jack Flaherty, and MacKenzie Gore. Valdez has transitioned to heavily relying on his curveball, leading to a surge in strikeouts and impressive ERA. deGrom's low ERA comes with concerns over workload and potential regression, making him a possible sell-high candidate. Ray continues to evolve, mixing his pitches effectively, while Flaherty has rebounded with strong performances. Gore leads MLB in strikeouts, proving to be a valuable asset.