Taylor Thompson release by Titans draws attention from NFLPA

The NFLPA is looking into the release of former Tennessee Titans tight end Taylor Thompson, a league source told ESPN.

Thompson, who was waived Friday, said he needs knee surgery for a lingering issue from last season. However, the team did not waive him with any type of injury designation.

Thompson is eligible to be claimed off waivers at 4 p.m. ET on Monday. He spent time away from the Titans during the nonmandatory portion of the team's offseason program. He returned to the team last week with his knee bothering him.

"To be honest with you, I don't know what to tell you," Titans head coach Ken Whisenhunt told the Tennessean last Wednesday. "When [Thompson] left here, however many weeks ago, he was healthy. We communicated, he said he was fine, no issues, other than some personal matters. He shows up, says there's something wrong with his knee, and I have no idea what he is talking about."

Thompson is considering surgical options, which include a cleanup surgery or microfracture surgery. Should he have microfracture surgery, that would likely keep him out for the entire 2015 season.

The 25-year-old Thompson appeared in just three games last season due to the knee injury.