The most famous one was directed at Bobby Petrino only to quit 13 games into the season to accept the head coaching job at the University of Arkansas .
Bobby Petrino hired Zimmer away from the Cowboys to the Falcons in 2007 .
The most famous one was directed at Bobby Petrino , who hired Zimmer away from the Cowboys to the Falcons in 2007 , only to quit 13 games into the season to accept the head coaching job at the University of Arkansas .