William Roger Clemens (born August 4, 1962), nicknamed "Rocket", is a retired American baseball pitcher who played 24 seasons in Major League Baseball (MLB) for four teams.
 Clemens was one of the most dominant pitchers in major league history, tallying 354 wins, a 3.12 earned run average (ERA), and 4,672 strikeouts, the third-most all time.
 An 11-time All-Star and two-time World Series champion, he won seven Cy Young Awards during his career, more than any other pitcher in history.
 Clemens was known for his fierce competitive nature and hard-throwing pitching style, which he used to intimidate batters.
Michael Francis McCormick (born September 29, 1938) is a retired American baseball pitcher who played 16 seasons in Major League Baseball (MLB).
 He played for the New York and San Francisco Giants, Baltimore Orioles, Washington Senators, New York Yankees and Kansas City Royals from 1956 to 1971.
 He batted and threw left-handed and served primarily as a starting pitcher.
James Anthony Piersall (November 14, 1929 – June 3, 2017) was an American baseball center fielder who played 17 seasons in Major League Baseball (MLB) for five teams, from 1950 through 1967.
 Piersall was best known for his well-publicized battle with bipolar disorder that became the subject of a book and a film, "Fear Strikes Out".
Robert Gibson (born November 9, 1935) is a retired American baseball pitcher who played 17 seasons in Major League Baseball (MLB) for the St. Louis Cardinals (1959–75).
 Nicknamed "Gibby" and "Hoot", Gibson tallied 251 wins, 3,117 strikeouts, and a 2.91 earned run average (ERA) during his career.
 A nine-time All-Star and two-time World Series champion, he won two Cy Young Awards and the 1968 National League (NL) Most Valuable Player (MVP) Award.
 In 1981, he was elected to the Baseball Hall of Fame in his first year of eligibility.
 The Cardinals retired his uniform number 45 in September 1975 and inducted him into the team Hall of Fame in 2014.
Christopher "Christy" Mathewson (August 12, 1880 – October 7, 1925), nicknamed "Big Six", "The Christian Gentleman", "Matty", and "The Gentleman's Hurler" was a Major League Baseball right-handed pitcher who played 17 seasons with the New York Giants.
 He was among the most dominant pitchers in baseball history, and ranks in the all-time top ten in several key pitching categories, including wins, shutouts, and ERA.
 In fact, he is the only professional pitcher in history to rank in the top ten both in career wins and in career ERA, if taking 19th century pitchers statistics into account.
 Otherwise, Mathewson and Walter Johnson would hold the distinction of being the only two pitchers ranked in both the top ten in career wins and career ERA.
 In 1936 , Mathewson was elected into the Baseball Hall of Fame, as one of its first five members.
Elwood Vernon "Kettle" Wirts (October 30, 1897 – July 12, 1968) was a professional baseball player who spent four seasons in Major League Baseball.
 In total, Wirts played 17 seasons in professional baseball, beginning his career in 1918 with the minor league Spokane Indians.
 Over his major league career, Wirts played for the Chicago Cubs and the Chicago White Sox and batted .163 with 14 hits, 2 doubles, 1 home run, and 8 RBIs in 49 games.
 Wirts also managed the Sacramento Senators for a part of the 1935 season.
Jeffrey Scot Suppan ( ; born January 2, 1975), known as Jeff Suppan, is an American retired professional baseball pitcher who played 17 seasons in Major League Baseball (MLB).
 He played for the Boston Red Sox, Arizona Diamondbacks, Kansas City Royals, Pittsburgh Pirates, St. Louis Cardinals, Milwaukee Brewers and San Diego Padres.
 Since 2015, Suppan has been the pitching coach for the Idaho Falls Chukars in the Kansas City Royals system.
The Omaha Rockets were a semi-pro, independent Negro league baseball team in Omaha, Nebraska from (year-year).
 Gene Collins and Bob Gibson both began their careers with the team.
 Pro Football Hall of Famer Night Train Lane also played briefly for the Rockets after graduating high school.
John Samuel "Jocko" Thompson (January 17, 1917 – February 3, 1988) was a professional baseball pitcher.
 He played all or part of four seasons for the Philadelphia Phillies of Major League Baseball from 1948 to 1951.
 He also served in the Army of the United States as a first lieutenant in the European theater during World War II.
 Thompson played in Major League Baseball during the Whiz Kids era during a career which spanned 12 seasons (1940–1941, 1946–1955).
 After attending Northeastern University, Thompson appeared as a situational pitcher and spot starter during the 1948, 1949, and 1950 seasons with the Phillies, and went 4–8 in his only season as a regular member of the team's starting rotation.
 After demotion to the minors in 1952, Thompson retired from baseball after the 1955 season.
Frederick Meloy "Fred" Frankhouse (April 9, 1904 – August 17, 1989) was an American baseball pitcher who played 13 seasons in Major League Baseball from 1927 to 1939.
 His specialty pitch was "the old roundhouse curve", and he was often referred to as a “spitballer” during his career as a pitcher.
 Frankhouse played in the National League for the St. Louis Cardinals (1927–1930), the Boston Braves (1930–1935), the Brooklyn Dodgers (1936–1938), and the Boston Bees (1939) In 1928, Frankhouse went to the World Series with the Cardinals but never got a chance to pitch.
 He did, however, receive a World Series ring with the rest of his team.
 In 1934, Frankhouse was a member of the All-Star roster.
 He made his major league debut on September 11, 1927 for the St. Louis Cardinals, and played his last game September 25, 1939 vs. New York Giants as a pitcher for the Boston Bees.

Question: Which retired American baseball pitcher who played 17 seasons in Major League Baseball got his start with the Omaha Rockets?
Answer: Bob Gibson