Promotion officials announced the new welterweight bout Tuesday. Weeks is a replacement for Matt Brown, who tested positive for COVID-19 and was forced to withdraw from the event. UFC on ESPN 31 takes place at the UFC Apex in Las Vegas on Saturday and is headlined by a bantamweight tilt between Jose Aldo and Rob Font.
Weeks was supposed to face Josh Quinlan on Dana White’s Contender Series on Sept. 7 but was forced to pull out of the fight due to COVID-19 protocols. The 28-year-old Missouri native is 5-0 as a professional, including a second-round TKO of Craig Fairley at LFA 99 on Feb. 12. Weeks also owns a 1-1 mark as a professional boxer.
Barberena, meanwhile, has lost three of his last four Octagon appearances. Most recently, the MMA Lab product dropped a majority decision to Jason Witt at UFC on ESPN 28 on July 31.