The trade deadline deal to send primary designated hitter Trey Mancini to the Houston Astros seemed as if it might open a spot both on the Orioles’ roster and in their lineup for power-hitting outfield prospect Kyle Stowers. When it didn’t, executive vice president and general manager Mike Elias said a promotion for Stowers “could happen at any time.” The time is now, with the Orioles selecting Stowers’ contract Friday amid a collection of moves.