Kremer (oblique) has begun a throwing progression, Roch Kubatko of MASNSports.com reports.
Kremer was initially expected to miss at least 3-to-4 weeks after being placed on the 10-day injured list April 11, but general manager Mike Elias said Wednesday that the right-hander is likely still several weeks away from rejoining the major-league club. Kremer has been playing long toss recently, but he'll still need to build up before returning to game action.