Dominic Breazeale represented the U.S. in the super heavyweight division at the 2012 Olympics. As a pro, he's 10-0 with 9 KOs.

Breazeale was a two-year starter at quarterback at the University of Northern Colorado. There have been other fighters before him with football backgrounds. None made significant headway.

Ed "Too Tall" Jones and Mark Gastineau were dominant defensive ends at the highest level. As boxers, they left much to be desired.

Too Tall interrupted his NFL career to try his hand at boxing. He won all six of his matches, but anyone that watched him in his televised debut vs. unknown Yaqui Meneses could see that he had no future in the squared circle.

Gastineau displayed no skill whatsoever in a televised 5-round fight with Tim "Doc" Anderson. It was hard to imagine that someone so clumsy could have been such an outstanding player. He left the sport with a 15-2 record, but did he ever win a fight that didn't leave a bad odor?

Gastineau's farewell fight found him pitted against Alonzo Highsmith. A fullback by trade, Highsmith played six seasons in the NFL after being the third overall pick in the 1987 draft. As a pro boxer he was 27-1-2, but it speaks reams that he never appeared in a bout scheduled for more than eight rounds.

Lee Canalito, a bonafide high school football star in talent-rich Texas and later a defensive tackle at the University of Houston, never fulfilled his promise. Sponsored by Sylvester Stallone and trained by Angelo Dundee, Canalito never lost, finishing 21-0, but he was never truly tested, defeating only five men that finished their careers with winning records.

The best all-around athlete in the history of the ring was Charlie Powell, a sensation in every sport that he tried during his high school days in San Diego. Deployed primarily as a defensive end, Powell started for the San Francisco 49ers at the age of 19, making him the youngest starter in NFL history.

As a boxer, Powell was good enough to earn dates with Floyd Patterson and Muhammad Ali, but not good enough to cause them much trouble. He finished his career with a record of 25-11-3 with eight losses coming inside the distance.

Perhaps Dominic Breazeale will scale great heights, but it doesn't appear that his football background will be of much use to him.