Bill Mettler

William Roy Mettler, Jr. (born October 15, 1946) is an American former competition swimmer and former world record-holder.

Mettler represented the United States at the 1964 Summer Olympics in Tokyo. He swam for the gold medal-winning U.S. team in the qualifying heats of the men's 4×200-meter freestyle relay. Mettler did not receive a medal; he was ineligible under the 1964 swimming rules because he did not swim in the event final.

Mettler attended Yale University, where he swam for coach Phil Moriarty's Yale Bulldogs swimming and diving team in National Collegiate Athletic Association (NCAA) and Ivy League competition from 1962 to 1964.