Leonard made his MLB debut with the Royals on September 4, 1974. By the following season, he had secured a spot in the starting rotation. Known for his durability and workhorse mentality, Leonard quickly established himself as a reliable pitcher. He was particularly noted for his ability to pitch complete games, a trait that became a hallmark of his career.
The 1977 season marked a breakout year for Leonard. He won 20 games, becoming the first pitcher in Royals history to achieve this milestone. His performance helped lead the team to their first American League West division title. Leonard's success continued over the next few years, as he consistently ranked among the league leaders in wins and innings pitched. He reached the 20-win mark again in 1978 and 1980, solidifying his reputation as one of the top pitchers in the American League.
Leonard's efforts were instrumental in the Royals' postseason appearances during this period. He played a crucial role in the team's journey to the World Series in 1980. Although the Royals ultimately fell to the Philadelphia Phillies, Leonard's contributions throughout the season and playoffs were undeniable.
Injuries, however, began to take a toll on Leonard's career. In 1983, he suffered a severe knee injury that required surgery, sidelining him for the entire 1984 season. Despite the setback, Leonard made a determined comeback in 1985. Although he was not able to return to his previous form, his presence provided a morale boost to the team. The Royals went on to win the World Series that year, defeating the St. Louis Cardinals, and Leonard's perseverance was celebrated by fans and teammates alike.
Leonard attempted to continue his career in 1986, but ongoing issues with his knee ultimately led to his retirement. Over his 12-year career, he amassed a record of 144 wins and 106 losses, with an ERA of 3.70 and 1,324 strikeouts. Leonard's ability to consistently deliver strong performances on the mound made him a respected figure in the Royals' history.
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