Undefeated Samuel "S3" Arnold III Headlines DMG Boxing's Five-Man Takeover at Champions of Tomorrow
The future of DMG Boxing is stepping into the spotlight, and Dallas's own Samuel "S3" Arnold III is leading the charge.
On October 10, Arnold headlines a stacked night for the DMG Boxing team at Champions of Tomorrow, presented by KO Boxing and Promotions, live from Thunder Studios in Long Beach, California.
For Arnold, it's the next step in a run that's turned heads across the light heavyweight division all year.
Who Is Samuel "S3" Arnold III?
Standing 6'3" and fighting out of an orthodox stance, the 23-year-old from Dallas, Texas has built one of the most dangerous undefeated records in the sport: 16-0 with 11 knockouts. Arnold currently campaigns at light heavyweight after making a statement move up from super middleweight, and he's shown no signs of slowing down against the bigger competition.
His resume already includes hardware to back up the hype:
WBA NABA Light Heavyweight Title (2026)
Arnold captured the light heavyweight strap with a first-round knockout — the kind of statement finish that doesn't just win a title, it puts a division on notice. With that win, "S3" has his sights on a world title now that he is ranked 7th world rankings, and every fight from here is a step toward that goal.
The Most Recent Statement: A First-Round Finish
Arnold's last time out came on May 16 against Rodolfo Ezequiel Martinez on the Mendoza vs. Rodriguez card, and it didn't take long to see why he's considered one of the division's rising threats. Fighting on the main card at a 175-lb limit (weighing in at 181.8 lbs), Arnold needed just 1:37 into the first round to get Martinez out of there via KO/TKO, with veteran referee Laurence Cole overseeing the stoppage.
It was the type of performance that turns a prospect into a problem for the rest of the division — fast, decisive, and impossible to ignore.
Champions of Tomorrow: DMG Boxing Takes Over Long Beach
Champions of Tomorrow marks a big night for the entire DMG Boxing stable, and Arnold headlines a roster built for fireworks:
Samuel "S3" Arnold III
David Romero
Juan Estrada Jr.
Brandon McCarthy
Rudy Hernandez
When: October 10 Where: Thunder Studios, Long Beach, CA Promotion: KO Boxing and Promotion
Five fighters representing one team, all looking to put their names on the map on the same card. For a stable on the rise, it's a chance to show depth — and for Arnold specifically, it's another opportunity to close the gap between undefeated prospect and legitimate world-ranked contender.
What's Next
An undefeated record, two regional titles, and a first-round finish in his last outing — Samuel "S3" Arnold III is building the kind of resume that world-ranked contenders are made of. October 10 in Long Beach is the next step.
Follow along for fight week updates, and stay tuned to see "S3" add another knockout to his highlight reel.
