Jeff Cobb is an American professional wrestler and former amateur wrestler, born on July 11, 1982, in Honolulu, Hawaii. He is currently signed to WWE, performing on the SmackDown brand under the ring name JC Mateo and is a member of the faction The Bloodline

. Before joining WWE, Cobb had a notable career in various wrestling promotions including Lucha Underground, where he wrestled as the masked character Matanza Cueto and was a former Lucha Underground Champion; New Japan Pro-Wrestling (NJPW), where he was a one-time NEVER Openweight Champion and three-time IWGP Tag Team Champion; Ring of Honor (ROH), where he held the ROH Television Championship; and Pro Wrestling Guerrilla (PWG), where he was a former PWG World Champion and winner of the 2018 Battle of Los Angeles tournament

. As an amateur wrestler, Jeff Cobb represented Guam at the 2004 Summer Olympics in the men's light heavyweight freestyle category and was the nation's flag bearer at the opening ceremony. He transitioned to professional wrestling in 2009

. Cobb is known for his athleticism and strength, weighing around 119-120 kg (265 lbs) and standing about 5 ft 10 in (178 cm) tall. He has earned nicknames such as "Eater of Worlds," "Hawaiian Hulk," and "The Monster"

. In summary, Jeff Cobb is a highly accomplished professional wrestler with a strong background in amateur wrestling and a successful career across multiple major wrestling organizations worldwide before his current tenure in WWE