Rollie Sheldon, a pitcher who won two World Series championships with the New York Yankees, has died at the age of 89.

The team announced his passing on social media, stating that Sheldon died on August 31 in Lee's Summit, Missouri. The cause of death was not specified.

"The Yankees mourn the passing of Rollie Sheldon and extend our deepest condolences to his family, friends and loved ones," the team said in a statement.

Sheldon was born in Putnam, Connecticut, in 1936. He served in the United States Air Force for four years during his late teens and early twenties. Following his military service, Sheldon attended Texas A&M for one semester before transferring to the University of Connecticut, where he played baseball and basketball. The Yankees signed him in 1960 when he was 23 years old, after he had played only one college season.