Gary Arthur Martz (January 10, 1951 – July 10, 2020) is a former Major League Baseball outfielder who played for one season. He played in one game for the Kansas City Royals on July 8 during the 1975 Kansas City Royals season. Martz attended West Valley High School in Spokane, Washington and received scholarship offers to play college baseball at Washington State and college football as a quarterback at Idaho. He instead chose to sign with the Seattle Pilots after being drafted in the fifth round of the 1969 MLB Draft.