Kelly was injured running to first on April 17. He's 1-1 with an 0.59 ERA in three starts heading into the start in Milwaukee and was 10-5 last year with a 2.69 ERA.
The right-hander is one of three starters on the 15-day disabled list. Michael Wacha is out indefinitely with a stress fracture in his pitching shoulder sustained in mid-June and lefty Jaime Garcia will undergo season-ending thoracic outlet surgery on Friday in St. Louis to relieve nerve issues that caused numbness and tingling in his shoulder, arm and hand resulting in a loss of feel for his pitches.
Lefty Kevin Siegrist was set to begin a minor rehab stint from a forearm strain that landed him on the DL on May 24.