Arizona Diamondbacks pitcher Robbie Ray (back) participated in a bullpen session on Friday.
Ray is expecting to return on Sunday after missing time with back spasms. The 27-year old left-hander will face a Milwaukee Brewers team rated 17th overall by numberFire's power rankings.
Through 26 starts this season, Ray has produced a 3.99 ERA and 187 strikeouts.
Source: Russell Dorsey