The Facts: The 33-year-old Welker, who is slated to become a free agent next month, is considering retirement after several years of head injuries and declining production, sources have told FOX Sports.

Diehards Line: According to FOXSports' Mike Garafolo, one of the sources said no final decision has been made, though Welker has told concerned friends, family members and associates he's at least giving serious thought to walking away. Welker had a total of 122 catches for 1,242 yards and 12 touchdowns in two regular seasons with the Broncos, though his reception total dropped from 73 in 2013 to 49 in 2014 and he had only two touchdowns this past season. Welker also suffered a concussion in the preseason -- the third documented concussion during his time in Denver. If Welker retires, he'll do so having put together an outstanding career for an undersized free agent. The 5-9, 185-pounder has 890 career catches for 9,822 yards. He had five 100-catch seasons with the New England Patriots before heading to Denver to join Manning.