- Served 22 seasons as the Head Track & Field Coach at the University of Houston and Santa Monica Track Club
- Member of U.S. Track Coaches Association Hall of Fame
- In each of his 2 USATF international coaching jobs, U.S. teams achieved the highest Gold medal tally among nations and led the overall medal table. Tellez was at the helm in 1991 at the 3rd IAAF World Championships in Tokyo, where he led Americans to 10 Gold medals and 27 medals overall. At the 1987 Pan Am games, Team USA produced 55 medals in Track & Field, with 26 of them Gold.
- Has produced some of the greatest track and field performers in the history of the sport, including International Olympic Committee Olympian of the Century, 6-time NCAA champion, 9-time Olympic Gold medalist Carl Lewis, former NCAA and Olympic 200-meter Gold medalist Joe DeLoach, 2-time NCAA champion and Olympic Silver medalist Kirk Baptiste, 3-time NCAA champion and Olympic Bronze medalist Frank Rutherford and Olympic Gold medal winner, 3-time NCAA champion and former WR 100-meter holder Leroy Burrell
- Between 1984 and 1996, Tellez’ athletes won 7 of the USA’s 13 medals overall and he coached 6 of the 7 USA sprinters who won Olympic Gold Medals
- Also coached 3-time NCAA Champion, 3-time Olympian and World Championship medalist Carol Lewis, 3 –time NCAA heptathlon Jolanda Jones, USA Olympic sprinter Jackie Washington, NCAA 200 meter champion Michelle Collins and other Olympians