Stewart made his MLB debut with the Dodgers in 1978, but he struggled in his first few seasons. He was traded to the Texas Rangers in 1983, where he began to establish himself as a reliable starting pitcher. In 1986, Stewart was traded to the Oakland Athletics, where he had the best years of his career.
Stewart was a key member of the Athletics teams that won three consecutive American League pennants from 1988 to 1990. He was known for his fierce competitiveness and his ability to pitch in big games. In the 1989 World Series, Stewart won two games and was named the Most Valuable Player of the series as the Athletics swept the San Francisco Giants.
After the 1992 season, Stewart signed as a free agent with the Toronto Blue Jays. He had a solid season in 1993, helping the Blue Jays win the World Series. Stewart then signed with the Oakland Athletics again in 1995, but he was not as effective as he had been earlier in his career.
Stewart retired after the 1995 season with a career record of 168-129 and an ERA of 3.95. He was a four-time All-Star and won 20 or more games in four consecutive seasons from 1987 to 1990. He also won the ALCS MVP award in 1990.
After his playing career, Stewart worked as a pitching coach for several teams, including the San Diego Padres, Toronto Blue Jays, and Arizona Diamondbacks. He was also the general manager of the Diamondbacks from 2014 to 2016.
Stewart is remembered as one of the best pitchers of his era, known for his fierce competitiveness and his ability to pitch in big games. He was a key member of several championship teams and was a dominant force on the mound for many years.
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