William Charles Monbouquette (August 11, 1936 – January 25, 2015) was an American professional baseball player and coach.

He played in Major League Baseball (MLB) as a right-handed pitcher for the Boston Red Sox (1958–65), Detroit Tigers (1966–67), New York Yankees (1967–68), and the San Francisco Giants (1968).

Monbouquette was signed by the Boston Red Sox as an amateur free agent in 1955 and started his majors career on July 18, 1958.

[1] On September 25, 1965, in a game against the Kansas City A's, Monbouquette was the starting pitcher versus 58-year-old Hall of Famer Satchel Paige.

Monbouquette threw a complete game for his tenth win of the season, but became the final strikeout victim of Paige's career in the 3rd inning.

Although Bamberger denied that there had been any conflict between the two, Monbouquette told The New York Times, "You can't have two pitching coaches on the same club.

The chemotherapy and drug treatment he received had the disease in remission, but he needed a bone marrow and stem cell transplant to be cured.