An alternate on the 2012 U.S. Olympic team, Toledo, Ohio, native Robert Easter Jr. had a quick ascent in becoming a 135-pound world champion.

The only boxer to represent the U.S. in three Olympics, southpaw Rau'shee Warren won a world title at 118 pounds and now seeks a second bantamweight strap.

After defecting from his native Cuba, switch-hitting Rances Barthelemy became a 130-pound champ before winning a second world title at 135.

A 2004 Olympian for his native Colombia, 5-foot-1½ Oscar Escandon packs a lot of punch as he powers his way toward a world title shot at 126 pounds.

Long-time contender Miguel Flores has proven to be one of the most durable and exciting fighters in the sport today.

Since turning pro at the age of 20, Fresno, California, native Marcos Hernandez has shown talent beyond his years competing at 154 pounds.

Since making his professional debut at age 18, exciting Texan Mario Barrios has been blasting opponents all the way to becoming a Super Lightweight World Champion.

A member of the 2012 U.S. Olympic team, hard-hitting southpaw Marcus Browne has quickly risen into title contention in the 175-pound division.

New York native Luis Collazo is a former world champion at 147 pounds, and the southpaw has battled some of the biggest names in boxing.

A two-time amateur national champion, Delaware’s Kyrone Davis turned pro in 2014 and has established himself as a serious contender in multiple divisions.