The fights at UFC Apex are on ESPN+, with the 7 p.m. ET main card preceded by prelims at 4 p.m.
Allen (18-1) has won 11 fights in a row, most recently a first-round knockout of Dan Hooker in March. Allen is No. 8 among 145-pounders in the ESPN rankings.
The ninth-ranked Kattar (23-6) has lost two of his last three bouts — all of them earning fight of the night bonuses. He is coming off a split-decision loss to Josh Emmett in June.
How to watch the fights
Stream all of the fights on ESPN+: Download the ESPN App
Don’t have ESPN+? Get it here.
There’s also FightCenter, which offers live updates for every UFC card.
Saturday’s UFC fight card
ESPN+, 7 p.m. ET
Men’s featherweight: Calvin Kattar vs. Arnold Allen
Welterweight: Max Griffin vs. Tim Means
Heavyweight: Jared Vanderaa vs. Waldo Cortes-Acosta
Middleweight: Josh Fremd vs. Tresean Gore
Light heavyweight: Dustin Jacoby vs. Khalil Rountree Jr.
ESPN+, 4 p.m. ET
Middleweight: Phil Hawes vs. Roman Dolidze
Heavyweight: Andrei Arlovski vs. Marcos Rogerio de Lima
Middleweight: Junyong Park vs. Joseph Holmes
Men’s featherweight: Chase Hooper vs. Steve Garcia
Men’s flyweight: Carlos Mota vs. Cody Durden
Men’s bantamweight: Christian Rodriguez vs. Joshua Weems
Ian Parker’s betting tip
While Allen looked like an unstoppable force in his last fight, winning via TKO over Dan Hooker, he won his four previous fights by decision. Kattar, win or lose, has also gone to decision in his last four fights. That is something interesting to look at when betting on this fight. Both men are extremely durable and have been finished only once in their careers. If you felt you had to bet a side here, I would lean Kattar. However, I believe the strongest play would be to bet the over, with the line set at 3.5 rounds.
For Parker’s suggested bets on other fights on Saturday’s card, check out the ESPN+ expert picks and best bets article (link below). It also features analysis by MMA coach Danny Castillo and ESPN’s other betting expert, Reed Kuhn.