Ken Griffey Jr. was elected to the Hall of Fame on the first ballot, receiving 99.32% of the vote. He becomes the 51st player elected in their first year. His percentage of votes is the highest all-time. Mike Piazza was also elected in his fourth year on the ballot.
With three players (Maddux, Glavine, Thomas) elected in 2014 and four players (Johnson, Martinez, Smoltz, and Biggio) elected in 2015, this now makes a total of nine players elected in a three-year span. This is only the third time that has happened in history, following 1954-56 and 1936-38.