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Speed coach Christopher Mack trains many of his young athletes at Jackie Robinson Stadium in Rancho Cienega Sports Complete. Photo by Jason Lewis

Coach Mack has sent more than 50 high school athletes to college by dramatically increasing their speed.

Eric Yarber started out playing football at Crenshaw High School and made it all the way to the NFL. He’s now the Los Angeles Rams’ wide receiver coach. Photos by Jeff Lewis/Los Angeles Rams

Yarber grew up as a huge Los Angeles Rams fan, and now he is the team’s wide receivers coach.