Two more middleweights have joined the UFC on FOX 15 card, as Ronaldo “Jacare” Souza takes on Yoel Romero in the co-main event.

Set for April 18 from New Jersey, Lyoto Machida and Luke Rockhold will meet in the headline bout.

Souza (21-3) and Romero (9-1) were originally scheduled for this month, but Souza was knocked out of training with an illness.

Below is the current lineup:

Middleweight: Lyoto Machida vs. Luke Rockhold

Middleweight: Ronaldo “Jacare” Souza vs. Yoel Romero

Bantamweight: Aljamain Sterling vs. Takeya Mizugaki

Lightweight: Jim Miller vs. Paul Felder

Female Strawweight: Paige VanZant vs. Felice Herrig

Middleweight: Eddie Gordon vs. Chris Dempsey

Light Heavyweight: Corey Anderson vs. Gian Villante

Light Heavyweight: Ovince St. Preux vs. Patrick Cummins

Middleweight: Nick Catone vs. Vitor Miranda

Welterweight: Kenny Robertson vs. George Sullivan