Lynn Richard Lovenguth (November 29, 1922 – September 29, 2000) was an American professional baseball player.

He batted left-handed, stood 5 feet 10 inches (1.78 m) tall and weighed 170 pounds (77 kg).

Lovenguth won 193 games during his minor league career (losing 174), including two 20-win seasons.

In 1956, he was named the International League's pitcher of the year after he posted a 24–12 record and a 2.68 earned run average in 39 games and 279 innings pitched with the Toronto Maple Leafs.

He went into the eighth inning with the Cardinals holding a 2–1 lead; Lovenguth had surrendered only three hits and one unearned run.