Wasinger managed in independent league baseball, then became a scout for the Padres (1996–2002), where he scouted and signed Jake Peavy in 1999. He joined the Boston Red Sox in 2003, working as an amateur scouting regional cross-checker, a professional scout and special assignment scout for general managers Theo Epstein and Ben Cherington. He was promoted to special assistant/player personnel in January 2015.

Wasinger rose through the Padre system, batted above .300 four times in his first five pro seasons, and was named a 1985 All-Star in the Double-A Texas League. But, following a three-game trial with San Diego in September 1986, he was traded to San Francisco in April 1987 and would spend the rest of his big-league tenure with the Giants. He split the 1987 season between the Giants and Triple-A, and collected 22 hits in a reserve role for San Francisco. On May 9, 1987, in his second game as a Giant, Wasinger collected four hits in five at bats, including a home run, and scored three runs, in a 9–4 defeat of the Pittsburgh Pirates at Candlestick Park. His 888-game minor-league playing career essentially ended after the 1993 season.

Born in Monterey, California, Wasinger attended Old Dominion University. In 1981, he played collegiate summer baseball with the Cotuit Kettleers of the Cape Cod Baseball League. He was a third-round selection by the Padres in the 1982 Major League Baseball Draft.

Mark Thomas Wasinger (born August 4, 1961) is an American professional baseball scout and front-office official, and a former Major League player. A third baseman, second baseman and shortstop, he appeared in 50 MLB games between 1986 and 1988 for the San Diego Padres and San Francisco Giants. He threw and batted right-handed, and was listed at 6 feet (1.8 m) tall and 165 pounds (75 kg).