TOKYO—Richard Torrez Jr. went into the Olympic boxing ring on Wednesday with a game plan jointly concocted over the phone by his father back home in central California and by Billy Walsh, his national team’s head coach in Tokyo. The 22-year-old super heavyweight from Tulare then executed the plan perfectly and repeatedly until his Kazakh opponent’s face was split too far open to continue the third round, thanks to a brutal barrage of Torrez’s confounding overhand lefts. Torrez advanced to the Olympic final on Sunday, when he’ll have a chance to be the first U.S. super heavyweight to win gold since Riddick Bowe in 1988. He could even be the first American man to win boxing gold in 17 years—but only if featherweight Duke Ragan and lightweight Keyshawn Davis don’t beat him to it in the ensuing three days. Afterward, Torrez lavished praise on his coaches and the revitalized national …