Robert Andrew Witt Sr. (born May 11, 1964) is an American former professional baseball pitcher who played 16 seasons in Major League Baseball (MLB) for the Texas Rangers, Oakland Athletics, Florida Marlins, St. Louis Cardinals, Tampa Bay Devil Rays, Cleveland Indians, and Arizona Diamondbacks.

He pitched for the Rangers until the 1992 season, when he was traded along with Jeff Russell and Rubén Sierra to division rival Oakland for Jose Canseco.

[8][9] His home run was hit off of Ismael Valdez of the Los Angeles Dodgers in the top of the sixth inning.

In 2001, his last season in MLB, Witt pitched in 14 games for the Arizona Diamondbacks, seven as a starter, and finished with a 4–1 record.

Witt appeared in Game 2 of the 2001 National League Championship Series against Atlanta, pitching in the eighth inning.

He pitched the eighth inning in relief of Randy Johnson, with the Diamondbacks leading 15–2 over the New York Yankees.

He walked one batter and finished by striking out Shane Spencer, before Troy Brohawn took over for the ninth inning.

[12] As of April 2015[update], Witt lived in Colleyville, Texas, with his wife and four children and was a player agent.