Coaching and front office rumor mill roundup

Teams will be deciding the fates of coaches and front-office types all week long. You can follow the actual/official hirings and firings over at our 2012 Coaching Tracker, but we'll keep you up to date on all the rumors and speculation here (all times ET).

Tuesday, Jan. 1

2:15 p.m.
	CBS Sports NFL Insider Jason La Canfora tweets: "CLE, AZ, PHI and SD all interested in Penn State's Bill O'Brien according to pro and college sources. Pursuit begins this week."
1:55 p.m.
	ESPN's Adam Schefter tweets THE Chargers will reportedly interview Cardinals vice president of player personnel Steve Keim for their vacant GM position sometime this week.
1:35 p.m.
	ESPN's Adam Schefter tweets that the Bills have reportedly asked for permission to interview Broncos' offensive coordinator Mike McCoy.
1:08 p.m.
	There's no way Titans owner Bud Adams fired GM Mike Reinfeldt because he failed to land Peyton Manning, right? RIGHT?!
12:15 p.m.
	USA Today's Mike Garafolo tweets that the Bills will interview Ken Whisenhunt Wednesday. PFT adds that Cards' defensive coordinator Ray Horton and offensive line coach Russ Grimm.
11:00 a.m.
	In news that should surprise no one, the Philadelphia Inquirer reports that Oregon's Chip Kelly is th Eagles' top target to replace Andy Reid.
10:15 a.m.
	According to PFT, former Colts president Bill Polian won't be the next Chiefs general manager.
10:00 a.m.
	NFL Network's Albert Breer tweets that "Per source, Buddy Nix will remain the Bills' general manager."
8:00 a.m.
	ESPN's Adam Schefter tweets: "Syracuse head coach Doug Marrone is scheduled to interview this week for Cleveland Browns' [job] and also will interview for Buffalo Bills' [job]."