I did some poking around yesterday just in case Arians would be gone.
One thing that really jumped out at me was the number of guys Tomlin has brought in new that he's had a prior relationship with. He worked with Garrett Giemont, Randy Fichtner, and Kriby Wilson all before they were with him on the Steelers. Giemont and Wilson were with him at Tampa Bay.
Having said that, here's my best guess.
John Shoop, the current North Carolina OC.
http://www.tarheelblue.com/sports/m-...op_john00.html
He was the quarterbacks coach for one year in Tampa when Tomlin was the DBs coach, back in 2004. That year, Brian Griese had the best season of his career, throwing for 20 TDs and leading the NFL with a 69.3% completion percentage (and a 7.8 YPA so it wasn't him being Captain Checkdown).
Shoop is only 42 but has a ton of experience. Was the OC for three years with the Bears and the final five games with Oakland in the 2006 season.
He has been the Tar Heels' OC since 2007 and really helped develop TJ Yates. Also been there to coach Hakeen Nicks and Greg Little. The numbers might not be mind-boggling, but then again, they're not running the spread like nearly every other team.
College teams have shown interest in promoting/hiring him. He was in the running for the head coaching gig at Richmond and reports were Boston College wanted him as their OC. Obviously, they have to be getting good reports on the job he is doing.
I think it's time for him to get back into the NFL.
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So that is my best guess. Other guy who caught my eye is Jimmy Robinson, the WRs coach in Dallas.
http://www.dallascowboys.com/team/te...Jimmy_Robinson
Doesn't have any OC experience which is a pretty big knock for a guy coacihng 22 years, he's only been a WRs coach his entire life. But he's been apart of some great WR groups. Was in Indy from 94-97 and helped jumpstart Marvin Harrison's career (in the same way Arians doid to Manning). Was with the Giants for some of the best years Amani Toomer had. Was with the Saints in 2004 and 2005 before heading to Green Bay from 2006 to 2010 and had guys like Greg Jennings put up gaudy numbers while developing players like Jordy Nelson and James Jones. He was with Dallas for his first year last year and has continued the development of Dez Bryant while turning Laurent Robinson into a breakout player.
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So my top four choices are:
1. Randy Fichtner
2. John Shoop
3. Hue Jackson
4. Jimmy Robinson