Notre Dame quarterback Jimmy Clausen was punched in the face by an irate fan outside a South Bend restaurant early Sunday morning and has a swollen eye, a person briefed on the incident said on Monday.

That person said Clausen was "sucker-punched" by a fan as he left an establishment after having dinner with his parents.

The fan allegedly said something to Clausen and/or a female acquaintance.

A South Bend police spokesman said that no police reports were filed over the weekend involving Clausen, according to the Chicago Tribune.

The newspaper also reported that the name of the bar was CJ's and that a bartender at the establishment said that Clausen had been there with family members and other Irish upperclassmen after Notre Dame's loss to Connecticut on Senior Day.

The source told ESPN.com that the injury is not expected to keep Clausen from playing this weekend against Stanford.

Joe Schad is a college football reporter for ESPN.com.