Kelly (illness) threw four innings and 66 pitches in a rehab start with the Diamondbacks' rookie-level Arizona Complex League affiliate Thursday, MLB.com reports.
Kelly has now had three separate outings since coming out of isolation due to COVID-19 protocols. Before Thursday's rehab start, Kelly completed a 23-pitch bullpen session and a 51-pitch start in an intrasquad game. Arizona manager Torey Lovullo hasn't ruled out Kelly's next start coming in the majors; the right-hander would presumably slot into the Diamondbacks' rotation as soon as Tuesday in Los Angeles versus the Dodgers.