- Given Name: Charles Robert O'Neil
- Pro MMA Record: 17-9-0 (Win-Loss-Draw)
- Nickname: Cold Steel
- Current Streak: 1 Loss
- Age: 1985-09-22 | Date of Birth: 1985.09.22
- Last Fight: November 04, 2016 in CES
- Weight Class: Middleweight | Last Weigh-In: 185.0 lbs
- Affiliation: Mass BJJ Acton
- Height: 6'2" (188cm) | Reach: 76.0" (193cm)
- Career Disclosed Earnings: $10,500 USD
- Born: Falmouth, Massachusetts, United States
- Fighting out of: East Bridgewater, Massachusetts
Regional Rankings Rankings FAQ
Chuck O'Neil is ineligible for regional rankings due to inactivity.
Fighters must have at least one completed MMA bout in the past two years to be ranked.