Mark Tennis has been watching California high school football games since 1973 when he was in the ninth grade in Sacramento. He co-founded Cal-Hi Sports with his late uncle, Nelson Tennis, in 1979. Since then, he has been editor of Cal-Hi Sports from its inception as a newsletter to its current website CalHiSports.com. Tennis also has edited and helped compile seven California high school sports record books and was editor of the national Student Sports Magazine for eleven years (1993-2004). He was inducted into the CIF Sac-Joaquin Section Hall of Fame along with Nelson as the first two media members in 2010.