An injury has forced Mark Bocek to pull out of his UFC 165 bout against Michel Prazeres and replacing Bocek will be UFC newcomer Jesse Ronson.
UFC officials announced the change on Thursday and the bout will be apart of the preliminary card.
UFC 165 takes place on September 21st from the Air Canada Centre in Toronto and will be headlined by Jon Jones defending the UFC light heavyweight title against Alexander Gustafsson.
Ronson (13-2) has won eight straight fights and his last defeat came against current UFC lightweight Mike Ricci in 2011. His most recent victory came in July as he defeated Shane Campbell by submission.
Prazeres (16-1) was signed by the UFC earlier this year after opening his career with 16 straight wins. He lost his UFC debut to Paulo Thiago by decision at UFC on FX 8 earlier this year.
The current UFC 165: Jones vs. Gustafsson card is below:
Jon Jones (18-1) vs. Alexander Gustafsson (15-1)
Renan Barao (30-1, 1NC) vs. Eddie Wineland (20-8-1)
Costa Philippou (12-2, 1NC) vs. Francis Carmont (21-7)
Khabib Nurmagomedov (20-0) vs. Pat Healy (29-16, 1NC)
Myles Jury (12-0) vs. Mike Ricci (8-3)
Ivan Menjivar (25-10) vs. Norifumi Yamamoto (18-6, 1NC)
Brendan Schaub (9-3) vs. Matt Mitrione (6-2)
Stephen Thompson (7-1) vs. Chris Clements (11-4, 1NC)
Jess Ronson (13-2) vs. Michel Prazeres (16-1)
John Makdessi (11-2) vs. Renee Forte (8-2)
Nandor Guelmino (11-4-1) vs. Daniel Omielanczuk (15-3-1, 1NC)
Mitch Gagnon (9-2) vs. Dustin Kimura (10-0)
Roland Delorme (9-1, 1NC) vs. Alex Caceres (8-5, 1NC)