Depending on the design problem they address, design patterns can be classified in different categories, of which the main categories are: 1  Creational Patterns. 2  Structural Patterns. 3  Behavioral Patterns.
In the 35 nine-inning games played through last night, the average length of a MLB game has been 2 hours, 52 minutes , according to Michael Teevan, spokesperson for Major League Baseball.
Except Yankees games. Through Sunday, Yankees' games this season took an average of three hours, three minutes, and 48 seconds to play, just above what MLB's average was a year ago.