Tim Tebow sports a new hairdo during warmups after veterans gave haircuts to rookies prior to a Denver Broncos practice at Invesco Field August 7, 2010 in Denver,CO.

New England Patriots rookies pose with their new haircuts after training camp practice in Foxboro, Mass., Tuesday, August 16, 2005.

New England Patriots linemen Stephen Neal (61) and rookie Logan Mankins, right, chat about Mankins's rookie haircut during training camp practice in Foxboro, Mass., Tuesday, August 16, 2005.

New England Patriots rookies, from left, Mike Elgin, Justin Rogers and Clint Oldenburg walk onto the field with some unflattering hair cuts given by veterans during a training camp in Foxborough, Mass., Wednesday, Aug. 15, 2007.

Denver Broncos rookie quarterback Tom Brandstater (3) shows off his new haircut to rookie center Blake Schlueter (63) who also received a special trim, as they take part in drills at the team's NFL football training camp in Englewood, Colo., on Tuesday, Aug. 11, 2009.

Oakland Raiders defensive end Desmond Bryant (67) shows off a new rookie haircut as he stretches before an NFL game against the Dallas Cowboys, Aug. 13, 2009 in Oakland. The Raiders won the game, 31-10.

Dallas Cowboys rookies, from left, San Young, Will Barker, Phil Costa, and Mike Tepper going through drills during the team's NFL football training camp, in San Antonio. Each received a special hair cut from their veteran lineman teammates as part of a rookie ritual.

Denver Broncos rookie offensive lineman Paul Duncan from Notre Dame sports his new haircut during NFL football training camp at Broncos headquarters in Englewood, Colo., Tuesday, Aug. 10, 2010. Rookies received new haircuts from veterans Saturday.

Oakland Raiders guard Lucas Nix (76) sports a rookie haircut during the NFL preseason week 1 football game against the Dallas Cowboys on Monday, August 13, 2012 in Oakland, California. The Cowboys won the game 3-0.

Denver Broncos rookie quarterback Paxton Lynch jokes with teammates as he heads to the locker room after the teams' joint NFL football training camp session against the San Francisco 49ers on Thursday, Aug. 18, 2016 in Englewood, Colo. Lynch, like the rest of the team's rookies, was sporting a new haircut as part of an end-of-camp tradition carried out by veterans.

Dallas Cowboys rookies San Young, left, Phil Costa, center, and Will Barker are seen during the team's NFL football training camp, Thursday, Aug. 5, 2010, in San Antonio. Each received a special hair cut from their veteran lineman teammates as part of a rookie ritual.

Denver Broncos offensive tackle Justin Murray wears a "rookie haircut" on the bench during a preseason NFL football game against the San Francisco 49ers, Saturday, Aug. 20, 2016, in Denver.

Denver Broncos offensive tackle Lars Hanson (78) and offensive guard Aaron Neary (72) wear "rookie haircuts" on the bench during a preseason NFL football game against the San Francisco 49ers, Saturday, Aug. 20, 2016, in Denver.