One of the most underrated pitchers of his time, Dennis Leonard won more games from 1975 through 1982 than any major league pitcher except Steve Carlton, but never made an All-Star team. In his first full season, 1975, Leonard was 15-7, and he followed up with a 17-10 record in 1976. Starting in 1977, he won at least 20 games in 3 of the next 4 years. Leonard was the ace of the Royals' pitching staff that dominated the AL West from 1976-78, when the Royals won 3-consecutive division championships. Leonard also helped the Royals win the pennant in 1980 with his 20-11 record.
In May 1983, Leonard's left-knee imploded on a pitch to Cal Ripkin, which forced Leonard to miss the rest of the year and all of 1984. Leonard pitched only two innings in 1985, before returning for a full season in 1986, his last before retiring.