Racing PositionsIf the Mariners land a star, all their other moves might finally make sense8YDavid SchoenfieldBoogfest! A's OF homers to namesake's BBQ8YPowell makes A's debut after asthma scare8YMariners trade for A's Alonso for stretch run8YMariners activate Haniger after stint on DL9YESPN.com news servicesM's Powell makes MLB debut -- without batting9YMariners place Scribner on DL, call up Powell9Y