Asher was promoted to Triple-A Lehigh Valley on Friday.
The 24-year-old hasn't been able to miss bats at an acceptable clip since joining the Phillies organization last season, and this year has been no different, as he had 16 strikeouts in 25.1 innings at Double-A. He will be an option to join the Phillies' rotation at some point this year, but the fantasy upside will be minimal.