Orioles Demote Struggling Starter Tyler Wells to Double-A, Call Up Reliever

Orioles sent Tyler Wells to Double-A after three poor starts following All-Star break.
Joey Krehbiel called up from Triple-A to replace Wells, fueling speculation Orioles may add to rotation before trade deadline.
Orioles starters have performed well overall this season, but position players and bullpen key to success.
Wells has 1.02 WHIP and 7-6 record with 3.80 ERA but struggled recently.
Move comes with trade deadline approaching and Orioles looking to bolster roster.