How To Build A 21st-Century Bullpen With Failed Hitting Prospects And A Radar GunEarlier this month, Sean Doolittle made his major-league debut for the Oakland Athletics. It wasn't an obviously momentous event: The left-hander took the mound with two outs in the top of the fifth, with the A's trailing Texas 5-0. He struck out Nelson Cruz to end the inning, then pitched a perfect...
