Caleb Ferguson: Everything you need to know

The Reds assigned Ferguson (oblique) to Double-A Chattanooga to begin a rehab assignment Tuesday. The left-hander opened the season on the IL due to an oblique strain but is now in the final stage of his rehab program. Ferguson will likely require at least a few appearances in the minors before being cleared to join the active roster.

Ferguson (oblique) threw 16 pitches in a one-inning simulated game Monday, MLB.com reports. Ferguson is scheduled to follow up Monday's session with another one Friday. If all goes well Friday, Ferguson will likely begin a rehab assignment of at least six appearances. The left-hander has been battling the injury since mid-March.

Ferguson (oblique) threw a bullpen session Thursday that went well and is scheduled for another one Sunday, MLB.com reports. If all goes well in Sunday's session, Ferguson could progress to facing live batters Tuesday. The next step beyond that would be a rehab assignment.