Lynn Nolan Ryan, Jr. (born January 31, 1947), nicknamed The Ryan Express, is a former Major League Baseball (MLB) pitcher and a previous chief executive officer (CEO) of the Texas Rangers. He is currently an executive adviser to the owner of the Houston Astros.

During a major league record 27-year baseball career (1966, 1968–1993), he pitched for four different teams: the New York Mets, California Angels, Houston Astros, and Texas Rangers. He was inducted into the Baseball Hall of Fame in 1999.

Ryan, a hard-throwing, right-handed pitcher, threw pitches that were regularly recorded above 100 miles per hour (161 km/h). The high velocity remained throughout his career, even into his 40s. Ryan was also known to throw a devastating 12–6 curveball at exceptional velocity for a breaking ball.

While his lifetime winning percentage was .526, Ryan was an eight-time MLB All-Star, and his 5,714 career strikeouts rank first in baseball history by a significant margin. He leads the runner-up, Randy Johnson, by 839 strikeouts. Similarly, Ryan's 2,795 bases on balls lead second-place Steve Carlton by 962—walking over 50% more hitters than any other pitcher in MLB history. Ryan, Pedro Martínez, Randy Johnson, and Sandy Koufax are the only four pitchers inducted into the Baseball Hall of Fame who had more strikeouts than innings pitched. Other than Jackie Robinson (whose number was retired by the entire MLB), Ryan is currently the only major league baseball player to have his number retired by at least three different teams: the Angels, Astros, and Rangers.

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