O'Brien walked one, hit a batter and struck out one in a scoreless and hitless inning to earn the save in Saturday's 4-1 win over Atlanta.
O'Brien wasn't quite at his best while pitching for the third time in four days, but he got the job done. He's on a seven-inning scoreless streak and has earned six saves with a 6:2 K:BB in that span. The All-Star reliever has converted 24 of 28 save chances this season while pitching to a 3.43 ERA, 1.12 WHIP and 39:13 K:BB through 39.1 innings. O'Brien presumably won't be available if a save opportunity surfaces Sunday -- JoJo Romero or Ryne Stanek would be top options to step in for a save chance since George Soriano has also pitched consecutive days.