Mike Trout’s MVP year in 2014 saw him play his final regular game at the age of 23 years and 52 days; few had ever been younger in the concluding contest of an MVP campaign. Trout’s bragging rights among active players didn’t last very long, for Bryce Harper — the 2015 NL MVP — played his last game of this most recent season at 22 years and 353 days old.