Major League Baseball is the only major sport without a clock. In the 2018 season, the average nine-inning game lasted three hours, according to Baseball Reference. Overall, games (including extra-inning games) lasted 3 hours, 4 minutes in 2018.
Over the course of this decade, the average pace of play in MLB has slowed. In 2010, a nine-inning game took 2 hours, 50 minutes to complete. Since then, however, games have taken longer to complete every year except 2015. That was last MLB season in which the average nine-inning game took less than three hours (2 hours, 56 minutes). In 2017, an average nine-inning MLB contest lasted 3 hours, 5 minutes, the slowest in the majors' recorded history, according to Baseball Reference.
Near the midpoint of the 2019 season, a nine-inning game lasted 3 hours, 3 minutes. MLB is on pace to challenge the record for slowest pace, set in 2017. MLB initiated several pace-of-play initiatives in 2018. For example, mound visits were limited to six per team per nine innings, according to MLB.com. A rule giving a pitcher a certain amount of time to deliver a pitch was considered but has not been implemented.
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