Michael Rubin’s assets are growing. The 76ers co-owner is part of a group that will purchase vintage team jersey maker Mitchell & Ness. Rubin, the founder and chief executive of Fanatics, will team up with rappers Meek Mill, Jay-Z and Lil Baby along with sports-marketing businessman Maverick Carter and Tik Tok’s D’Amelio family to purchase Mitchell and Ness. Multiple reports have the purchase for $250 million.