Dan Patrick Masteller is a former Major League Baseball first baseman. He played one season in the majors for the Minnesota Twins in 1995. Originally drafted by the Twins in the 11th round of the 1989 Major League Baseball draft, Masteller played in their organization until June, 1995, when he made his major league debut. Masteller was released after the season, and played for the Harrisburg Senators in the Montreal Expos organization in 1996 before his career ended.