 As a consequence, Mahay (and all other replacement players who later made the big leagues) is not eligible for membership in the Major League Baseball Players Association.Mahay made his Major League debut with the Red Sox on May 21, 1995, as an outfielder, and appeared in five games, batting .200 with four hits in 20 at-bats, including two doubles and a home run.He was returned to the minors after a month.