Going into Monday's series opener against the Brewers at Miller Park, Maurer had 50 appearances -- 13 more than he had in 2014 with the Mariners when he began the season as a starter before moving to the bullpen in the second half.
Since June 25, Maurer has a 7.07 ERA, allowing 20 hits in 14 innings over 18 games. Before then, he had a 1.50 ERA with 18 hits allowed in 36 innings over 33 outings.
Could fatigue be a factor?
"I've been tired the last couple days," said Maurer, who allowed a three-run walk-off home run in the ninth inning Sunday against the Marlins.