Kelly ultimately hired Jim O'Neil to run his defense .
Vrabel played outside linebacker in the NFL from 1997 to 2010 , including for Kelly 's good friend , Patriots coach Bill Belichick .
Kelly ultimately hired Jim O'Neil to run Kelly 's defense .
Vrabel played outside linebacker in the NFL from 1997 to 2010 , including for Kelly 's good friend , Patriots coach Bill Belichick .