The Oakland Athletics reinstated outfielder Seth Brown (oblique) from the 10-day injured list on Monday and optioned infielder Jordan Diaz to Triple-A Las Vegas in a corresponding move. Brown is starting in right field and is hitting cleanup in his first game back on Monday night against right-hander Luis Castillo and the Seattle Mariners. The 30-year-old left-handed hitter has played in only eight games this year due to his left-oblique strain, but he's now back in the outfield picture for ...