Haha. It's as if you don't understand the psychological effect an incredible baserunner can have on a pitcher. It's easy to say "It's on the pitcher though." No, it's because Billy is a menace once he gets on base and most pitchers in baseball would be distracted by him.
Funny how you make fun of the notion that David Holmberg's 14.46 ERA is nothing to worry about because it's only April. But you have no trouble downplaying Hamilton's value during the same month.