Macha confirmed what was highly suspected, either Chris Narveson or Manny Parra will be moved from the rotation to bullpen duty upon Davis' return from chest discomfort. Dave Bush will start Monday against the Giants and Randy Wolf will take the hill Tuesday, but Wednesday's starter is still up in the air.
Narveson failed to impress Friday night, going five innings and allowing four runs in the 5-0 loss to the Cardinals. He was at his best in his previous start, however, blanking the Mariners over eight innings. Over his previous five starts, Narveson has gone 3-2 with a 4.30 ERA.
Parra had one last chance to impress Saturday against the Cardinals. He went five innings and gave up four runs in his last start and is 2-3 with a 4.18 ERA over his last five games.
"I would like to throw it out there that making the club happy and pitching well will get you in a spot where you should be," Macha said.
Macha also said that previous performance coming out of the bullpen would not affect his decision.
In 27 games as a reliever, Parra has posted a 4.10 ERA with a 1.428 WHIP. Narveson has made 30 appearances as a reliever with a 4.95 ERA and 1.603 WHIP.
"[I'm] not so worried about the bullpen numbers," Macha said.
"You need your five best starters out there."