John Woodward Blocher II (born August 24, 1951) is an American former professional tennis player. Born in California, Blocher started getting tennis lessons at the age of seven and was a successful junior player. In 1967, competing in the 16's age division, Blocher won an Orange Bowl title and was the national clay court champion. Blocher played collegiate tennis for Southern Methodist University but was sidelined for much of the time with a serious wrist injury, although he was an All-American in his senior year.