Yogi Berra
Yogi took a break between minor league and major league baseball to enlist in the United States Navy and went on to become one of the greatest catchers in the game.
Joe DiMaggio
Another legendary Yankee, Joe DiMaggio, spent three years of his career in the Air Force and still with the Yankees he won a remarkable 9 World Series in 13 years. He was also named MVP 3 times and is well known for his unfathomable 56-game hitting streak.
Ted Williams
Willie Mays

He spent nearly two full seasons in the army during the Korean War and came back strong as a star player; ending his career with 12 Gold Glove awards, two MVP awards and The Rookie of The Year in 1951.