Muhammad defends his welterweight title against challenger Della Madelena in the UFC 315 main event May 10 at Bell Centre in Montreal. The announcement comes after Machado Garry declared himself the backup following his unanimous decision win over Carlos Prates in the main event of Saturday's UFC on ESPN 66 in Kansas City,

The Fighting Nerds' four pillars -- Carlos Prates, Caio Borralho, Jean Silva and Mauricio Ruffy -- accumulated a remarkable 19-0 combined run in the UFC. But on Saturday, Ian Machado Garry brought the team's undefeated streak to a screeching halt.

Follow UFC Kansas City results and live round-by-round updates for the Ian Machado Garry vs. Carlos Prates fight card on Saturday night in Kansas City.