The Titans (finally) name team captains

Ken Whisenhunt said after practice today that the Tennessee Titans have finally named captains:

Whiz says captains are Lewan, Walker, Orakpo, Casey, McCourty, Woodyard.

— John Glennon (@glennonsports) October 21, 2015

Of course the interesting note here is the name that is not on that list- Marcus Mariota.  The only other NFL teams that have permanent captains that don't have the quarterback as a captain are the Browns, Texans, Buccaneers, Redskins (per Wikipedia, which is never wrong).  It doesn't mean anything, but I was just curious how many other teams didn't have the quarterback as a captain.