Keller (1-1), who left with an injury, was tagged with the loss after allowing two runs on five hits with one strikeout and one walk over 2.2 innings Saturday against the Cubs.
Keller left the outing with side discomfort and is questionable until the team announces further details regarding his status. Manager Derek Shelton said after the game he had no updates on the 24-year-old, but he hopes to have more information about Keller's status Sunday morning.