Milestones | Pitching Feats Walter Johnson of the Washington Senators wins his 400th career game. May 12, 1926May 10, 2019 Milestones, Pitching Feats On May 12, 1926, Walter Johnson of the Washington Senators wins his 400th career game. The “Big Train” defeats the St. Louis Browns, 7-4, to reach the rarely-achieved milestone.