Denver Broncos quarterback Tim Tebow is keeping his opinion about whether gay and lesbian couples should be allowed to marry to himself.

The 23-year-old Heisman trophy winner appeared last year in a pro-life ad for the Christian conservative group Focus on the Family.

In the ad, his mother, Pam Tebow, calls her youngest child her “miracle baby.”

“I call him my miracle baby,” Pam Tebow says as she holds a photo of her son as an infant up to the camera. “He almost didn't make it into this world.” (The video is embedded in the right panel of this page.)

The pro-life ad, which ran during last year's Super Bowl at a cost of $3 million and was panned as “confusing” by critics, secured Tim Tebow's position as a Christian celebrity.

The ad also ruffled feathers in the gay community because Focus is virulently anti-gay.

But whether the professional athlete agrees with Focus on gay rights issues isn't something he's talking about.

In a recent interview with The Washington Post reporter Sally Quinn for the paper's On Faith blog, Tebow was shushed when Quinn brought up the question.

“Only once, when asked about same-sex marriage, did his publicist, on the other end of the phone, protectively jump in to object that that was off message,” Quinn reported.

Tebow's non-response comes just weeks after former New York Giants wide receiver David Tyree said gay marriage would lead to “anarchy.”