Michigan will be without cornerback Ambry Thomas for the foreseeable future. According to Wolverines coach Jim Harbaugh, Thomas was diagnosed with colitis and is not currently practicing — or on the active roster — as he recovers. “He has lost quite a bit of weight," Harbaugh said Tuesday night. "He’s gained that weight back. If there isn’t setbacks, then there will be milestones that he will be able to achieve. With no timeline on that." Harbaugh first publicly commented on Thomas' condition at Big Ten media days in Chicago in July. Harbaugh said then Thomas was "working through a little something right now" and he didn't know if Thomas would be ready for camp. The hope, Harbaugh said in July, was Thomas "would be there at the beginning of camp or soon after camp starts." Thomas continues to recover from his condition. There is no current timeline for the process, Harbaugh said. "It’s right now where he can be here, he can come to meetings, he can do conditioning and get treatment," Harbaugh said Tuesday. "We’ll find out where he is from a conditioning standpoint and how much football he can do over the next week to 10 days. When it’s determined what he can do, then that’s what he’ll do, and we’ll monitor for setbacks. "Next milestone after that, he’ll be able to run at full speed and have conditioning and strength. Next milestone will be to start playing football without contact, again, always monitoring to see if there’s setbacks. After that, then he’ll be declared to participate in contact. So those are the milestones that he has to achieve, without a timetable.” Thomas, a junior and former 4-star recruit, was projected to be a starter at cornerback this fall . He played primarily as a backup and on special teams last season. He recorded nine tackles, one interception, one fumble recovery and returned 19 kicks for 412 yards and a touchdown. He also tallied two receptions for five yards and one carry for 11 yards in limited snaps on offense. Michigan's secondary must replace cornerback David Long, nickel cornerback Brandon Watson and safety Tyree Kinnel. Lavert Hill, who has started the past two seasons, figures to start at one cornerback spot, while Josh Metellus, also a two-year starter, projects to start at one of the safety positions . Thomas was going to figure heavily into that conversation. For now, Michigan's secondary will have to do without him. Despite Thomas' absence, Harbaugh appears to like Michigan's depth at cornerback. “As I said, Vince Gray is doing a heckuva job," Harbaugh said. "DJ Turner, Jaylen Kelly-Powell doing really well. Gemon Green is trying to find out how good he is, he’s got a lot of potential and a lot of ability and developing that belief in himself. Just keep working and not worrying, and I really truly believe he’s going to be a fine football player as well. Jalen Perry’s another guy that’s doing well at the corner position. We’ve got good players there.” Contact Orion Sang at firstname.lastname@example.org . Follow him on Twitter @orion_sang . Read more on the Michigan Wolverines and sign up for our Wolverines newsletter .