Probably only O'Brien , his family , and his agent know for sure .
You can expect to hear much more on this over the coming weeks as NFL teams wrap up the regular season and prepare for the annual turnover in head coaching jobs .
Probably only O'Brien , his family , and his agent know for sure , but you can expect to hear much more on this over the coming weeks as NFL teams wrap up the regular season and prepare for the annual turnover in head coaching jobs .