Manaea is set to be recalled Friday and start that night for the A's against the Astros, The San Francisco Chronicle reports.
According to the the Chronicle, Jesse Hahn was penciled in as Friday's starter but a blister on his pitching hand will prevent him from taking the mound, so the A's are set to promote their prized pitching prospect. Manaea, the uber-talented left-hander that came over to Oakland from Kansas City in last summer's Ben Zobrist trade, has been dominant in his first three starts at Triple-A this season. He's gone 18.0 innings, notching 21 strikeouts against just four walks while working a 1.50 ERA. He'll be facing a strikeout-prone Astros lineup Friday and he'll be opposed on the mound by Mike Fiers.