Dade Hayes Finance EditorThe XFL, a twice-unsuccessful professional football alternative to the NFL fronted by WWE chief Vince McMahon, has been sold to Dany Garcia, Dwayne Johnson and RedBird Capital Partners for $15 million.The new owners were selected as the winning bidder for the assets controlled by Alpha Entertainment, the parent company of the XFL. The transaction is subject to bankruptcy court approval at a hearing this Friday.