Steven Jack Kline (born October 6, 1947) is an American former professional baseball player, a former starting pitcher who appeared in Major League Baseball from 1970 through 1974 and in 1977. Listed at 6 feet 3 inches (1.91 m) tall and 200 pounds (91 kg), Kline batted and threw right-handed. In a six-season MLB career, Kline posted a 43–45 record with 240 strikeouts and a 3.26 ERA in 750⅓ innings and 129 games pitched, 105 as a starter. He allowed 708 hits and 184 bases on balls. He now is a pitching coach at Wenatchee High School 4A in WA.