
Heavyweight · Active · USA
Nicolai Firtha
“Stone Man”
At a glance
- Born
- February 8, 1979 (age 47)
- Nationality
- USA
- Birthplace
- USA
- Division
- Heavyweight
- Height
- 6ft 6in (198 cm)
- Stance
- Orthodox
- Pro debut
- June 24, 2004
- Based in
- Akron, Ohio, USA
Story
Boxing Only · Updated Nov 29, 2025
Nicolai Firtha, nicknamed “Stone Man,” is an American heavyweight boxer from Akron, Ohio, who competed professionally between 2004 and 2013. A tall, durable operator at 6 ft 6 in (198 cm), he boxed exclusively at heavyweight. He finished his career with an official record of 21 wins, 11 losses and 1 draw, including 8 wins inside the distance, from 33 professional bouts.
Born on 8 February 1979 in Akron, Ohio, Firtha also fought out of his home state for most of his career. He had a substantial amateur background as a US super-heavyweight, reaching the latter stages of several national tournaments and earning bronze at the 2003 US Championships and silver at the 2004 US Championships before taking part in the 2004 US Olympic Trials. This experience gave him a solid technical foundation and prepared him for the long, often demanding schedule of a professional heavyweight journeyman.
Firtha made his professional debut on 24 June 2004 in Akron, stopping Toby Vaughn, and boxed frequently on club shows around Ohio and neighbouring states during his first few years in the paid ranks. By 2009–2010, he had developed into a seasoned, recognised opponent on the US scene. His best domestic run came in 2010, when he outpointed Joseph Rabotte and Mike Sheppard and then stopped Tony Grano on 26 June 2010 to win the NABA USA heavyweight title, adding the Ohio State heavyweight title in the same period. Those regional belts marked the peak of his achievements in terms of formal titles.
That success earned Firtha opportunities against higher-profile opposition. On 18 December 2010, he travelled to Berlin to face the unbeaten future WBA heavyweight champion Alexander Povetkin over ten rounds on a major undercard. Povetkin injured his right hand early but still won a wide unanimous decision; contemporary reports noted that while the fight was one-sided on the cards, Firtha’s size, persistence and aggression made him a useful test and he remained competitive enough to be described as game throughout. This performance helped cement Firtha’s reputation as a tough, reliable gatekeeper at the world level.
Firtha’s next major showcase came against Tyson Fury at the King’s Hall in Belfast on 17 September 2011. Taking the bout on short notice, he absorbed heavy punishment in the opening rounds. Still, he turned the fight briefly in the third when he landed a big overhand right that badly shook Fury and left the British prospect reeling, with some observers feeling he came close to forcing a knockdown. Fury recovered, scored a knockdown over Firtha in the fourth and stopped him in the fifth, but the American’s third-round rally is often cited as an early scare in Fury’s rise.
Later, on 18 February 2012, Firtha went the distance in a losing effort against Johnathon Banks for the NABF heavyweight title in Munich, further underlining his role as a seasoned opponent trusted with regional championship assignments.
The final phase of Firtha’s career was highlighted by his bout with another future world champion, Deontay Wilder. On 26 October 2013, on the Bernard Hopkins vs Karo Murat undercard at Boardwalk Hall in Atlantic City, Firtha started aggressively and had some early success, but Wilder’s speed and power soon told; the American puncher scored knockdowns and ultimately stopped Firtha in the fourth round to retain the WBC Continental Americas heavyweight title. Firtha did not box again after this contest. There is no widely reported single reason for his retirement, but with no further fights recorded after October 2013, he is regarded as having ended his professional career at that point.
In terms of style, Nicolai Firtha was a tall, physically strong heavyweight who relied more on pressure, durability and persistence than on one-punch knockout power. Contemporary descriptions of his performances against Povetkin, Fury and Wilder emphasise his toughness, willingness to come forward and ability to absorb punishment while firing back. These traits suited his role as a journeyman and barometer for emerging contenders. His nickname “Stone Man,” inherited from his father and a family friend, reflected this reputation for resilience. Sharing the ring competitively, if ultimately unsuccessfully, with three future world heavyweight champions made Firtha a notable figure of his era’s supporting cast, even without world-title honours of his own.