Wiktionary
n. People who play baseball, particularly in the major leagues.
Wikipedia
Boys of Summer is a three volume Original English-language manga written by American Chuck Austen and illustrated by Japanese artist Hiroki Otsuka. It is a romantic comedy that deals with the main character's relationships with women upon his arrival at college as well as his relationship with the school's baseball team. The series is published by Tokyopop and is rated as suitable for persons over the age of 16 as it contains scenes with partial nudity.
"Boys of Summer" is the first episode of the fourth season of the HBO original series The Wire. Written by David Simon from a story by David Simon & Ed Burns, and directed by Joe Chappelle, it originally aired on September 10, 2006.
Usage examples of "boys of summer".
With it, she helped us here at the magazine remember our fondness for baseball, baseball stories, and the boys of summer.
Not compared to the boys of summer out there in the Land of the Lotus Eaters.