Lynn Richard Lovenguth (November 29, 1922 – September 29, 2000) was an American professional baseball player. The right-handed pitcher played for 16 seasons (1946–61) in minor league baseball, with two Major League trials for the 1955 Philadelphia Phillies and the 1957 St. Louis Cardinals. He batted left-handed, stood 5 feet 10 inches (1.78 m) tall and weighed 170 pounds (77 kg).

Lynn attended Camden High School (Camden, New York) and was signed by the Philadelphia Phillies in 1946 as a free agent.

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. The native of Camden, New York, played in nine Major League organizations.^[1]

In the Majors, Lovenguth appeared in 16 games, going winless in two decisions and 20 strikeouts in 27 innings. He issued 16 bases on balls and gave up 23 hits for a 1.444 WHIP. He was given his only starting assignment in what would be his last big-league game, on September 27, 1957, against the Chicago Cubs. He went into the eighth inning with the Cardinals holding a 2–1 lead; Lovenguth had surrendered only three hits and one unearned run. But the Cubs rallied in the eighth and scored twice on three hits to pin Lovenguth with the 3–2 defeat.^[2]

Lynn Lovenguth died at age 77 in Beaverton, Oregon.