updated 11:56 p.m.: Injured Michigan football player Troy Woolfolk grateful for support

"Troy Woolfolk suffered a lower body injury during practice this afternoon and was transported to U-M Hospital with our team physician. We can’t comment further due to medical privacy rights."

The Detroit Free Press reported late Tuesday night that Woolfolk had dislocated an ankle.

Late Tuesday night, Woolfolk Tweeted: "I just want to let everybody out there that has shown concern for me know that I greatly appreciate it, and I love all y'all. ... Even though T-Woolf will be absent, Troy will be on the sidelines coaching and cheering for Michigan till all the air has vacated my lungs."

Woolfolk, a senior cornerback, is the most experienced member of the team's secondary. He started six games at safety and six at corner last year, although he planned to concentrate on cornerback in 2010. 

Woolfolk was expected to be Michigan's most dependable member of the secondary, where the Wolverines are already thin because redshirt freshman Justin Turner left the program last week.

After Turner's departure, Rodriguez said he planned to play safety Teric Jones more at cornerback. Depending on the severity of Woolfolk's injury, the Wolverines might need to consider adding more bodies.

They've been snake-bit at cornerback over the past year.

In addition to Turner's untimely departure, Donovan Warren left school early after the 2009 season to enter the NFL Draft, expecting to be a mid-round draft pick. Instead, he signed an unrestricted free-agent deal with the New York Jets. 

This spring, the Wolverines signed highly touted recruit Demar Dorsey. He could have played safety or cornerback, but the university denied his admission. 

Boubacar Cissoko started the first four games of the season at right cornerback last year, but was kicked off the team for violating internal rules, and subsequently pled guilty to four robbery charges.

Adrian Witty was a highly touted 2009 cornerback recruit, but never made it to campus as a non-qualifier.