Caleb Ferguson: Everything you need to know

Ferguson (oblique) walked one over a scoreless inning for Triple-A Louisville on Friday. Ferguson, who also threw Thursday, worked on back-to-back days for the Bats, which is typically a final box to be checked off for a reliever before coming off the injured list. The left-hander has made four appearances combined between Louisville and Double-A Chattanooga. The Reds' bullpen has fallen apart in May (8.47 ERA) and could use Ferguson as soon as possible.

Ferguson (oblique) allowed one run on one hit and struck out two over one inning for Double-A Chattanooga on Friday. Ferguson threw 16 pitches (12 strikes) as a game opener in his second rehab appearance for the Lookouts. The Reds are expected to have the left-hander throw at least two more games for Triple-A Louisville, MLB.com reports.

Ferguson (oblique) walked one and struck out one over a scoreless inning for Double-A Chattanooga on Tuesday. Ferguson threw 14 pitches (seven strikes) in his first outing while on a rehab assignment with the Lookouts. The left-hander is expected to be used as an opener Friday before throwing out of the bullpen next week for Chattanooga, per MLB.com.