Lough returns from DL stint for hamstring injury

Outfielder provides depth off bench; Gamboa sent to Triple-A

Lough returns from DL stint for hamstring injury

BALTIMORE -- As expected, outfielder David Lough was activated on Monday night and knuckleballer Eddie Gamboa optioned to Triple-A, a move that leaves the O's with 12 pitchers for the first time this season.

"We're always a sum of the parts," manager Buck Showalter said of why it was important to get an extra bench player.

"We were a tough start away from having to look somewhere else. If you look at the optional pieces there [in the bullpen], a little more of a challenge than it's been in the past. Just being able to present a lot of different looks and be able to defend."

Lough -- sidelined by a hamstring injury -- played in a rehab game Sunday at Class A Advanced Frederick, making three plate appearances and going 0-for-2 with a sacrifice fly. Gamboa, added on Saturday, did not pitch for the Orioles.

Brittany Ghiroli is a reporter for MLB.com. Read her blog, Britt's Bird Watch, and follow her on Facebook and Twitter @britt_ghiroli. This story was not subject to the approval of Major League Baseball or its clubs.