Michigan scandal sparks player injury concerns, athletic directors tell to Big Ten must 'step up': report

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Big Ten Commissioner Tony Petitti hosted a conference call with athletic directors from across the conference on Thursday to discuss Michigan football's alleged sign-stealing operation, according to a report from ESPN.

Michigan athletic director Warde Manuel reportedly did not participate in the video. Sources told ESPN that the various athletic department leaders voiced their support for the conference taking action in regard to the sign-stealing scandal.

Earlier this week, Petitti is believed to have held a meeting with coaches. Petitti is also believed to have informed Thursday's meeting attendees that he would wait on the discovery of more facts before any decision is made.

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Michigan Wolverines helmet on the sideline during the Spring Game at Michigan Stadium. (Rick Osentoski-USA TODAY Sports)

Additionally, Petitti is believed to have met with the NCAA to discuss the alleged operation. However, it remains unclear whether college football's governing body will share information with Petitti and the Big Ten as it becomes available during its investigation.

Petitti also expressed his desire to discuss the issue with presidents of schools from across the Big Ten, per ESPN. He also appears to want to learn more from Michigan officials and possibly have further discussion with the NCAA.

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"The athletic directors had a clear message -- we believe the conference needs to step up," a source familiar with the context of the call told ESPN.

The B1G Logo on display on the microphone stand during the Big Ten