In November 1982, he won the Fort Riley, Kansas Post Freestyle Wrestling Championship in the 158 lbs weight class.
[10] In November 1983, he won his second Ft. Riley Post Wrestling Championship in the 158 lbs weight class and was selected the "Outstanding Wrestler" of the tournament.
[22][23] In July 1991, Hernandez won two Gold Medals at the 1991 Amateur Athletic Union National Masters Free-Style Wrestling Championships held in Battle Creek, Michigan.
[25][26] Hernandez, at age 43, won three Gold medals, two Silvers and two Bronzes at the Grand National AAU Wrestling Championships.
[27] He participated in Sambo, Greco-Roman and Freestyle wrestling contested at the 3 day event in 1997,[28] held at Rabobank Arena in Bakersfield, California.
In 1999, he won the 1999 Fédération Internationale Amateur de Sambo Pan-American Gold and Bronze medals in the 180 lbs weight class.
[29][30] In April 2000, Hernandez won the XXV National AAU Sambo Championships held at Disney's Wide World of Sports Complex in Orlando, Florida.
In November 2000, Hernandez led the United States to a second-place finish at the FIAS World Cup of Sambo Wrestling held in Nice, France, himself winning a Silver medal.
In November 2001, Hernandez was again selected to represent the United States at the FIAS World Cup of Sambo held in Nice, France, where he took 5th place.
In May 2003, he won 2 Gold medals at the 6th World AAU Iron Man Wrestling Championships in Open and Masters division held in Knoxville, Tennessee.
Earlier in April 2015, he was crowned at the 2015 Cliff Keen USA Wrestling Folkstyle Nationals in the Veterans divisions, held at the UNIDome on the campus of the University of Northern Iowa in Cedar Falls.
Competing in the 60-64 age group in the +100 kg weight class, Hernandez defeated Sakhtan Bekpeiisuly of Kazakhstan 5-3 for the Bronze medal.