According to a report in The Wrestling Observer, Matt Brown will step in to replace fellow TUF 7 cast mate Matt Riddle at UFC 91. An injury forced Riddle out of the scheduled bout with Ryan Thomas.

Brown will now step in with a little under two weeks left before the fight.

The event takes place in Las Vegas and will feature a main event of Brock Lesnar challenging Randy Couture for the UFC Heavyweight Championship.

The rest of the card is as follows:

MAIN CARD (TELEVISED)

Champ Randy Couture vs. Brock Lesnar (for UFC heavyweight title)
Kenny Florian vs. Joe Stevenson
Nick Catone vs. Amir Sadollah
Gabriel Gonzaga vs. Josh Hendricks
Demian Maia vs. Nate Quarry

PRELIMINARY CARD (UN-TELEVISED)

Dustin Hazelett vs. Tamdan McCrory
Jorge Gurgel vs. Aaron Riley
Jeremy Stephens vs. Rafael dos Anjos
Mark Bocek vs. Alvin Robinson
Matt Brown vs. Ryan Thomas