In addition, Guilfoile was elected to Who's Who in American Colleges and Universities and received Notre Dame's Dome Award, which is presented annually to four seniors selected as the outstanding members of their class.

[1][2] In 1960, Guilfoile joined the New York Yankees of Major League Baseball, working as assistant public relations director for the club during 10 years.

[2] During his 37-year tenure in baseball, Guilfoile witnessed and was part of many memorable moments in Major League's history, such as the 1961 Roger Maris/Mickey Mantle home run chase, the 3,000th hit of Roberto Clemente in 1972, and the Hall of Fame’s 50th anniversary in 1989.

[1] After his retirement in 1996, Guilfoile received the Robert O. Fishel Award, Major League Baseball's highest honor given to the single person who best exemplifies public relations excellence.

[1] His son Kevin Guilfoile is a writer who has authored several books, including A Drive Into the Gap,[4] which delves into the mystery surrounding the bat that Clemente used for his 3,000th career hit, along with his father's vastly blessed history with baseball and his battle with Alzheimer's disease.