The 37-year-old athlete checked himself into rehab this week, more than a year after his near-fatal overdose in a Nevada brothel, which led to a lengthy recovery at a private rehabilitation center in Calabasas, California.
"It was his decision to go back," a source told ET. "He wants to get better and recently realized he needs to do this for himself, and especially for his children. He knows he needs help and unfortunately, this is something he'll need to take care of for the rest of his life. Drug and substance abuse is a serious issue."