DENVER,CO--DECEMBER 31ST, 2006--Bronco head coach Mike Shanahan paces the sidelines during the game between the Denver Broncos and the San Francisco 49ers at Invesco Field at Mile High on Sunday afternoon Dec. 31st, 2006 in Denver, CO. DENVER POST PHOTO B [Getty Images]

DENVER,CO--DECEMBER 31ST, 2006--Bronco head coach Mike Shanahan paces the sidelines during the game between the Denver Broncos and the San Francisco 49ers at Invesco Field at Mile High on Sunday afternoon Dec. 31st, 2006 in Denver, CO. DENVER POST PHOTO BY HYOUNG CHANG (Photo By Hyoung Chang/The Denver Post via Getty Images) — see more

DENVER,CO--DECEMBER 31ST, 2006--Bronco head coach Mike Shanahan paces the sidelines during the game between the Denver Broncos and the San Francisco 49ers at Invesco Field at Mile High on Sunday afternoon Dec. 31st, 2006 in Denver, CO. DENVER POST PHOTO BY HYOUNG CHANG (Photo By Hyoung Chang/The Denver Post via Getty Images)