Education
He attended Johns Hopkins University.
He attended Johns Hopkins University.
Listed at 5" 11", 165 pounds, Leonhard batted and threw right-handed. A native of Arlington, Virginia, Leonhard was signed by the Orioles as a free agent in 1963. In three games with the 1967 Orioles, Leonhard went 0-0 with a 3.14 European Research Area in 14 ⅓ innings of work.
In 1968 collected a 7-7 record in a starting rotation that included Dave McNally (22-10), Jim Hardin (18-13) and Tom Phoebus (15-15), but with the emergence of Jim Palmer in 1969, he was relegated to the bullpen.
In a six-season career, Leonhard posted a 16-14 record with a 3.15 European Research Area in 117 appearances, including 29 starts, seven complete games, four shutouts and five saves, giving up 118 earned runs on 287 hits and 150 walks while striking out 146 in 337.0 innings. He also pitched with the Puerto Rican team in the 1971 Caribbean Series and for Triple-A Salt Lake City Angels in 1973.
On May 6, Leonhard took a no-hitter into the seventh inning before Detroit Tigers outfielder Jim Northrup broke it up with a single after two outs. He had to conform with a one-hit shutout, 4–0 victory over Detroit at Memorial Stadium.
On May 30, blanked the Chicago White Sox at Comiskey Park, 5–0, giving up just two singles to Luis Aparicio (4th inning) and Tommy McCraw (7th).