Very few things can keep Mitch Keller from turning in five-plus innings of quality performance on the mound.
Since the first start of last season, Keller has only gone less than five innings twice. The first time was heading into the All-Star Break this year, when the Pirates gave Keller a break by limiting his final start of the first half to three innings. The second time was on Saturday night, when mother nature shut down his four shutout inning performance against the Arizona Diamondbacks.
That level of consistency has made Keller a top starter in the game.