Santiago vs Simsri

When is Santiago vs Simsri?

Rene Santiago could fight Thanongsak Simsri in Summer 2026 the United States.

The fight would be scheduled for 12 rounds in the Jr Flyweight division, which means the weight limit would be 108 pounds (7.7 stone or 49 kg).

Santiago would be making his 3rd defense of the WBO World Junior Flyweight Championship. He won this belt against Shokichi Iwata in March 2025. He has held this belt for 1 year, 1 month and 7 days.

He would be defending WBA World Light Flyweight Championship for the first time. He won this belt against Kyosuke Takami in December 2025. He has held this title for 4 months and 3 days.

Simsri would be making his 2nd defense of the IBF World Junior Flyweight Championship. He won this belt against Christian Araneta in June 2025. He has held this belt for 10 months and 1 day.

Santiago vs Simsri stats

Rene Santiago would step into the ring with a record of 16 wins, 4 losses, and 0 draws, 9 of those wins coming by way of knockout.

Thanongsak Simsri would make his way to the ring with a record of 40 wins, 1 loss and 0 draws, with 35 of those wins by knockout.

The stats suggest Simsri would have a massive power advantage over Santiago, boasting a 88% knockout percentage compared to Santiago's 56%.

Rene Santiago is the older man by 9 years, at 34 years old.

Both Rene Santiago and Thanongsak Simsri fight out of an orthodox stance.

Santiago is currently arguably the less experienced fighter, having had 21 fewer fights, and made his debut in 2014, 3 years and 6 months earlier than Simsri, whose first professional fight was in 2018. He has fought 15 fewer professional rounds, totaling 130 compared to Simsri's 145.

Rene Santiago goes into the fight ranked number 1 by The Ring at jr flyweight.

Thanongsak Simsri is currently ranked number 3 by The Ring in the 108lb division.

Santiago vs Simsri form

Rene Santiago has beaten 4 of his last 5 opponents.

In his last fight, he defeated Masataka Taniguchi on April 3, 2026, by unanimous decision in their WBO World Junior Flyweight championship fight at Korakuen Hall, Tokyo, Japan.

Prior to that, he had defeated Kyosuke Takami on December 17, 2025, by split decision in their WBA World Light Flyweight and WBO World Junior Flyweight championship fight at Kokugikan, Tokyo.

Going into that contest, he had beaten Shokichi Iwata on March 13, 2025, by unanimous decision in their WBO World Junior Flyweight championship fight at Kokugikan, Tokyo.

Before that, he had won against Azael Villar on October 30, 2024, by unanimous decision in their 10 round contest at Coliseo Alcalde Marcelo Trujillo Panisse, Humacao, Puerto Rico.

He had been beaten by Jonathan Gonzalez on March 2, 2024, by unanimous decision in their WBO World Junior Flyweight championship fight at Coliseo Jose Miguel Agrelot, San Juan.

Activity check

Santiago's last 5 fights have come over a period of 2 years, 3 months and 12 days, which means he has been fighting approximately every 5 months and 15 days. In those fights, he fought a total of 58 rounds, meaning that they have lasted 11.6 rounds on average.

Simsri's last 3 fights have come over a period of 1 year, 5 months and 30 days, meaning he has been fighting on average every 6 months and 1 day. In those fights, he fought a total of 26 rounds, meaning that they have lasted 8.7 rounds on average.

What are the odds on Santiago vs Simsri?

Sorry, we couldn’t find any odds for Santiago vs Simsri yet. If odds are not available initially after the fight is announced, bookmakers usually release them closer to the day of the fight.