Listed at 6 feet 3 inches (1.91 m) tall and 200 pounds (91 kg), Kline batted and threw right-handed.

[1] His most productive season came in 1972, when he recorded career-highs in wins (16), ERA (2.40), starts (32), shutouts (4), and innings pitched (236⅓).

He was traded along with Fritz Peterson, Fred Beene and Tom Buskey from the Yankees to the Indians for Chris Chambliss, Dick Tidrow and Cecil Upshaw on April 26, 1974.

[2] Kline missed the 1975 season with arm problems, and spent 1976 back in minor league baseball before making 16 relief appearances for Atlanta in 1977, his last Major League season.

[1] In a six-season MLB career, Kline posted a 43–45 record with 240 strikeouts and a 3.26 ERA in 7501⁄3 innings and 129 games pitched, 105 as a starter.