Jack Seale Heidemann was born July 11, 1949 in Brenham Texas. He was the first round draft pick of the Cleveland Indians (the 11th pick overall) in 1967. The six foot right handed hitter, batted .305 at A ball & played a solid infield. He made it to the big leagues as the Indians starting shortstop in 1970. He got a hit in his first MLB at bat, but only batted .211 on the season.
He posted a .961 fielding % making 23 errors at short stop (2nd in the AL) turning 79 double plays. He led the league in sac flies (10) hitting 14 doubles with 37 RBIs. He hit 6 HRs & was the only starting Indian not to hit 10 HRs.
In 1971 he improved to the fourth highest fielding percentage at shortstop (.977) but his season was cut short when he suffered a concussion. In a game against the White Sox, future Mets hitting coach Tom McGraw hit a pop fly to shallow left field; Heidemann, Vada Pinson and John Lowenstein all went for the ball & collided in the outfield. The ball rolled away & McCraw got an inside the park HR. Heidemann lost his starting job to Frank Duffy by 1972 and was traded to the World Champion Oakland A’s along with Ray Fosse for Dave Duncan & George Hendrick. He never played in the big leagues for Oakland, spending the 1973 season at AAA Tucson, batting .283. He eventually had his contract sold back to the Cleveland Indians.
In 1974 after batting .091 in 12 games he was traded to the St. Louis Cardinals for Luis Alvarado and Ed Crosby. There he hit a career best .271 in 47 games, but at the end of the year was traded to the New York Mets along with Mike Vail for shortstop Teddy Martinez.
He had a short career as a Met, backing up shortstops Bud Harrelson & Mike Phillips in parts of the 1975 & 1976 seasons. He would also play some third & second base as well. Heidemann had a good glove but hit little, with no power. he debuted in the second game of the 1975 season, when Yogi Berra called upon him to pinch run for Ed Kranepool. He stayed in the game & got a hit in his first Mets at bat off the Phillies Ron Schueler. In his third game with the Mets he had the biggest day of his career, coming against his old St. Louis Cardinal teammates.
In his first at bat he drew a bases loaded walk Thhen scored on a Jerry Koosman base hit in the Mets six run first inning. He later hit a bases loaded double, scoring all three runners; Rusty Staub, John Milner & Wayne Garrett, giving him a four RBI day. Three days later he hit his only Mets career HR, his first HR since 1970, in an 8-6 Mets win at Shea Stadium against the Chicago Cubs.
In early September he got some more starts & made the best of them. He drove in a run in three straight games, as well as having a three hit day in Pittsburgh against the Pirates on September 11th. Overall in 61 games he would hit .214 for the Mets with one HR, four doubles & 16 RBIs.
He began 1976 at AAA Tidewater & hit .356 there getting a call up that June. After only five games he was batting .083 and the Mets traded him to the Milwaukee Brewers for minor leaguer Tom Deidel.
Heidemann played behind veteran Don Money at third, & 21 year old shortstop Robin Yount at short. In 1976 he hit his final HR of his career off the Red Sox Bill Lee. Heidemann finished his MLB playing career in Milwaukee in 1977. In 1978 he went to the Seattle Mariners organization playing in the minors there for two years.
In his eight season career Heidemann hit .211 with 231 hits, 9 HRs 27 doubles 4 triples a .254 on base % & 75 RBIs. On the field he posted a .965 fielding %, making 42 errors in 1199 chances. He played 322 games at short, 51 games at third, 28 at second & one game at first base. After baseball he retired to Tempe, Arizona.