Tyreek Hill swears he was only kidding about wanting to do porn after retiring from the NFL, but the interest he's gotten from the industry is no joke -- TMZ Sports has learned multiple XXX companies want to help Cheetah kick-start his adult film career!!
Remember, Hill let loose on Twitch with Tampa Bay Buccaneers receiver Mike Evans last month, revealing how he wanted to stay "busy" when his football days were over ... however, the 29-year-old took back his statement a few days later.