Daniel Mengden and his mustache are back in Oakland.
The A's recalled Mengden from Triple-A Las Vegas on Sunday, and optioned J.B. Wendelken in a corresponding move. Mengden, 26, was 3-2 with a 2.77 ERA for the Aviators this season.
The right-hander has three years of major league ball under his belt. He went 7-6 with a 4.05 ERA last season.
Back in the lineup as well is A's slugger Khris Davis. The DH missed three games with a left hip contusion, but is back to batting fourth.
Davis is batting just .227 this year, 20 points off his usual mark, but does have 10 home runs.