Baseball History · On This Day On This Day: April 11 Posted on April 11, 2020 by Baseballia 1963 Warren Spahn’s Opening Day 6-1 victory over the Mets is the 328th win of his career. The Braves hurler moves ahead of Eddie Plank as the all-time winningest MLB left-hander. Except for Duke Snider’s home run, no Mets get past second base.