UPDATED Christos Giagos Replaces Rick Glenn at UFC Fight Night 183 Against Carlton Minus

Per sources, Saturday's fight between Rick Glenn and Carlton Minus is off.

No official reasons yet, but word is that Rick Glenn tested positive for COVID—19.

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I'm hearing, though, that the UFC is looking for a late replacement. #UFCVegas17

— Al Zullino (@phre) December 16, 2020

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Editor's note: This article has been updated at 11:30 p.m. ET on Dec. 17 to reflect additional information about the matchup.

The Ultimate Fighting Championship is making a quick switch ahead of its year-end card.

BJPenn.com first broke the story on Wednesday night that Rick Glenn was out of his UFC Fight Night 183 matchup against Carlton Minus (10-2, 1 NC). Multiple outlets have since confirmed Glenn’s withdrawal, which came from a positive COVID-19 test. In his place, according to BJPenn.com on Thursday, will be lightweight Christos Giagos (17-8). Due to the short-notice nature of this bout, Giagos will be facing Minus at a 160-pound catchweight, according to an official statement from the UFC on Thursday night.

“The Spartan” will make his first walk to the Octagon since August 2019, when he dropped a decision to Drakkar Klose. Giagos was scheduled earlier in the year against Alan Patrick, but the coronavirus scuttled the April fight card after he withdrew. On his second stint with the promotion, Giagos has won two and lost two, with his return to the UFC a submission defeat against Charles Oliveira. Giagos then rattled off two decisions over Mizuto Hirota and Damir Hadzovic before encountered Klose last year. The California native has gone the distance in seven of his last eight bouts.

Minus will be looking to earn his first win inside the Octagon when he faces Giagos. His organizational debut in August was an unsuccessful one, as Matthew Semelsberger overwhelmed him to win a decision. A product of Alaskan events, a then-undefeated Minus took his first trip to the major stage when he appeared in the 2018 season of Professional Fighters League. Minus suffered his first career loss at the hands of Rick Story, as “The Horror” put him to sleep with a rear-naked choke. Following that loss, Minus beat Schon Ellis in February to earn a spot with the UFC.

UFC Fight Night 183 goes down on Dec. 19 at the UFC Apex in Las Vegas to end the year for the UFC. Headlining the ESPN+ event is a welterweight thriller between Stephen Thompson and Geoff Neal. The co-main attraction comes in the form of a bantamweight battle between Jose Aldo and Marlon Vera, while another main card tilt in Kalinn Williams vs. Michel Pereira at welterweight precedes that.