Denver Broncos quarterback Tim Tebow is being called on to join the 'It Gets Better' campaign, which urges bullied gay teens to hang in there because life eventually gets better.

A petition started by Broncos fan Andy Szekeres which asks the Broncos to join the campaign has gathered more than 4,500 signatures.

The campaign singles out Tebow, a devout Christian who has credited his faith for his success in the NFL. Last year, Tebow and his mother starred in an anti-abortion ad for Focus on the Family which aired during the Super Bowl.

The Colorado Springs-based Focus on the Family has a long record fighting against gay rights.

Tebow has not made public his feelings on gay rights, including whether he believes gay and lesbian couples should be allowed to marry.

“It's the good Christian thing to do,” Szekeres, a 28-year-old Denver-based political fundraiser, told USA Today.

“The campaign is reaching people and changing lives. Within the gay community and with a lot of straight allies it's making a difference and raising critical issues.”

“It would really be an amazing thing for Tebow and the Broncos to do. To really say, 'We may have differences on abortion and gay marriage, but stopping kids from killing themselves is an issue we can all get behind.”

(Related: Rick Perry describes himself as the “Tim Tebow of the Iowa caucuses.”)