The average length of a baseball game as of 2015 is around three hours. Baseball games have almost doubled in duration since 1920. The average length of a baseball game then was about an hour and 47 minutes.
In April 2015, Major League Baseball implemented new pace-of-game rules. Results included an 8-minute decrease in an average nine-inning game the first week after the new rules took effect. Baseball Commissioner Rob Manfred stated the purpose of implementing these new rules is to decrease "dead time" during the game. One example of the new pace-of-game rules is that all hitters must keep at least one foot in the batter's box between pitches.