Thatcher took the loss in relief Monday after allowing a run on one hit and two walks in just a third of an inning against the A's. Thatcher (0-1) entered the game with two outs in the top of the fourth inning and struck out Josh Reddick, however, he failed to retire a batter when he came back out for the fifth, as he allowed an infield single and two walks to load the bases before exiting the game in favor of Will Harris. The 33-year-old southpaw was charged with the loss when one of Harris' inherited runners scored on an RBI single. With a 3.38 ERA and 1.50 WHIP, Thatcher has been the most unreliable member of Houston's bullpen to date. If his performance does not improve, the Astros may turn to Kevin Chapman or Darin Downs in the minors to take over the lefty specialist role out of the bullpen.