William Patrick McGuire (born February 14, 1964) is an American former professional baseball catcher for the Seattle Mariners of the Major League Baseball (MLB). McGuire attended Creighton Preparatory School in Omaha where he was regarded as one of the best high school catchers in the country. He was named to the ABCA/Rawlings High School All-America Baseball Team in both 1981 and 1982. He committed to playing college baseball at Nebraska over competing offers from Arizona, Arizona State, USC, Miami and Mississippi State among others. Although selected by the Cleveland Indians in the 25th round of the 1982 Major League Baseball draft, he chose to honor his commitment and enroll at Nebraska.