Rotation Depth Remains Athletics' Central Offseason Need

Jacob Lopez remains one of the Athletics' strongest post-All-Star positives, increasing the importance of finding complementary starters. Ginn's elbow setback, Severino's shoulder injury, Springs' uncertain future, Barnett's 7.16 ERA and Perkins' late struggles leave the rotation short on reliable options; Seth Johnson's knee surgery adds another complication to the pitching evaluation.