Paul Lionel Zimmerman (October 23, 1932 – November 1, 2018), known to readers as "Dr. Z", was an American football sportswriter and former player who wrote for the weekly magazine Sports Illustrated, as well as the magazine's website, SI.com. He is sometimes confused with Paul B. Zimmerman, a sportswriter who covered football for the Los Angeles Times from 1931 to 1968.