Aaron Boone stretching out wild-card mystery as long as possible

ST. PETERSBURG, Fla. — The only thing Aaron Boone is going public with regarding who will start the Oct. 3 AL wild-card game is that it won’t be a reliever. “The three starters we are considering, I would say it will be one of the three,’’ Boone said prior to the Yankees’ 4-1 win over…