ONE OF THE mysteries of the early days of NFL free agency is the lack of buzz about cornerback-safety Walter Thurmond, who was healthy and productive with the Eagles in 2015.

Multiple team sources said Friday that might be because Thurmond, who turns 29 in August, is contemplating retirement.

Reached by text, Thurmond asked "who started that rumor?" But when asked whether he wanted to deny it, he did not respond.

Thurmond, signed for one year and $3.25 million to provide depth at corner last season, helped the Eagles out greatly by being savvy enough to play inside at safety, despite not having played there before. He started all 16 games, the only time he has played the entire schedule in six NFL seasons. The Eagles credited him with 76 tackles, along with three interceptions, two sacks and two forced fumbles.

Thurmond had started Super Bowl XLVIII as the Seahawks' nickel corner, then signed as a free agent with the Giants, but tore a pectoral tendon in the second game and went down for the season. He previously was IR'd for a broken ankle/leg in 2011 and a hamstring injury in 2012. His senior college season at Oregon was cut short by a knee injury.

"It's part of the game," Thurmond told the Daily News last October. "If I suffer (another) serious injury, like the ones I've had to my leg or my knee, I would probably contemplate my future, as far as the NFL's concerned, but that's one of the things where I don't think about it, and I just go out there and play every game like it's my last, because you just never know in this business."

During the idle time arising from his pec injury, Thurmond worked at making contacts in filmmaking, an interest that had helped lead him to New York.

Last October, Thurmond said he was in preproduction "working on a documentary on the recording artist Eddie Levert (lead vocalist of the O'Jays) that I'm scheduled to direct."

Judging from photos on Thurmond's Twitter account, shooting on the documentary has begun.

Earlier this week, asked what he envisioned as free agency got underway, Thurmond texted: "Just going to make the best decision for myself and my future."