Oakland Athletics place right-handed pitcher J.T. Ginn on the 15-day injured list due to a blister on the middle finger of his pitching hand. The team’s designation is retroactive to last Saturday, when Ginn pitched in a 15-1 win over Washington and threw 6 1/3 scoreless innings while striking out seven batters and walking three. The blister affects the finger he uses to throw pitches, prompting the move to the injured list.