The Triple Crown

Baseball has a Triple Crown, which is awarded when one player in either the American League or the National League (or in some rare cases all of Major League Baseball) has the highest batting average, the most home runs and the most runs batted in during a single season.  Before Miguel Cabrera won the Triple Crown in 2012, Carl Yastremski was the last player to do it 45 years earlier while playing for the Boston Red Sox.  Only 14 players have achieved the feat.  Pitchers also have a triple crown for most wins, best earned run average and most strikeouts in a single season.  Winning the pitching Triple Crown has occurred more often.  Grover Cleveland Alexander did it three times. 

Horseracing has its own Triple Crown, and so does professional surfing, making, then, three Triple Crown awards, including baseball. 

from Threes, Chapter 10, “Threes in Sports and Games”