Arman Tsarukyan vs Mauricio Ruffy: lightweight co-main event preview at UFC 331

UFC 331: Van vs. Pantoja 2 lands on Saturday, September 19, 2026 at crypto.com Arena in Los Angeles, and the co-main event is Arman Tsarukyan against Mauricio Ruffy at lightweight, scheduled for 5 rounds. The card carries 13 bouts in our tables.

Tale of the tape

Arman Tsarukyan ("Ahalkalakets"), 29, comes in at 23-3-0, listed at 5'7", with a 72.5-inch reach, fighting orthodox. Mauricio Ruffy, 30, comes in at 14-2-0, listed at 5'11", with a 75-inch reach, fighting orthodox. On the tape, Ruffy has 4 inches of height and 2.5 inches of reach. Tsarukyan is the younger by 1 year. Both fight orthodox.

• Record: Arman Tsarukyan 23-3-0 · Mauricio Ruffy 14-2-0
• Age: Arman Tsarukyan 29 · Mauricio Ruffy 30
• Height: Arman Tsarukyan 5'7" · Mauricio Ruffy 5'11"
• Reach: Arman Tsarukyan 72.5" · Mauricio Ruffy 75"
• Stance: Arman Tsarukyan Orthodox · Mauricio Ruffy Orthodox

What the archive says

Arman Tsarukyan has 1 completed UFC bout in the PropBetEdge archive: 1 win. That win came inside the distance. He last fought on Nov 22, 2025 and beat Dan Hooker by submission in round 2.

• W vs Dan Hooker — submission, R2 (Nov 22, 2025)

Mauricio Ruffy has 4 completed UFC bouts in the PropBetEdge archive: 3 wins and 1 loss. All of them came inside the distance. He last fought on Jun 15, 2026 and beat Michael Chandler by KO/TKO in round 1.

• W vs Michael Chandler — KO/TKO, R1 (Jun 15, 2026)
• W vs Rafael Fiziev — KO/TKO, R2 (Jan 31, 2026)
• L vs Benoît Saint Denis — submission, R2 (Sep 6, 2025)
• W vs King Green — KO/TKO, R1 (Mar 8, 2025)

What to watch

Range is the first thing the tape flags: Mauricio Ruffy owns a 2.5-inch reach advantage, which sets the distance Arman Tsarukyan has to cross to land. From our archive, Arman Tsarukyan has finished 1 of 1 archived win and Mauricio Ruffy has finished 3 of 3 archived wins. It is scheduled for five rounds, so the pace of the first ten minutes carries into a championship distance.

Algo lean: locked. PropBetEdge model pricing for this bout ships with UFC Pro; no pick is shown until the model has produced one.