Marty Appel (left) with Thurman Munson, Yankees catcher from 1969-79. Among his many books, Appel co-wrote Munson's memoir, which was updated in 2023.
By Adam Kluger
At age 23, Marty Appel became the youngest PR Director in Major League Baseball history, working for the New York Yankees and reporting directly to club owner, George Steinbrenner.
Years later…