David Wallace Heaverlo (/ˈhævərloʊ/ HAV-er-loh;[1] born August 25, 1950) is a former right-handed Major League Baseball relief pitcher.

He is noted for shaving his head at a time when it wasn't popular and wearing a uniform number usually assigned to players not expected to make the major leagues coming out of spring training.

He made his major league debut on April 14, 1975, for the Giants and pitched his last game on September 27, 1981, for the Athletics.

[2] His bald head earned him the nickname Kojak after the television detective played by Telly Savalas.

Heaverlo now works as the pitching coach for the Big Bend Vikings in Moses Lake, Washington.