Athletic director Bill Martin said he didn't know whether penalties, if any, might include forfeiture of the Wolverines' 14-9 victory over then-No.10 Penn State on Sept. 22. It was one of three games in which freshman safety Artis Chambers played this season.

Martin said Saturday that the university immediately contacted the Big Ten after learning that Chambers was ineligible under the conference's freshman rules. Chambers, who enrolled at Michigan in January, cannot play the remainder of the season and did not travel with the team for Saturday's game at Northwestern. The Fort Wayne, Ind., native can still practice with the Wolverines.

Big Ten spokesman Scott Chipman declined today to elaborate on the process a compliance subcommittee would use in determining possible sanctions against Michigan.

Martin and athletic department spokesman Bruce Madej said today that they could not talk about Chambers' case because of privacy laws. Coach Lloyd Carr refused to discuss the situation at his weekly news conference today.

Martin acknowledged Saturday that the university had misinterpreted Big Ten freshman eligibility rules.

"Obviously, I take full responsibility for that," he said. "This isn't on Lloyd — it's on us."