Generally, Major League Baseball (MLB) teams will continue play in light to moderate rain but will suspend play if it is raining heavily or if there is standing water on the field. Games can also be delayed or canceled for other forms of inclement weather, or if the field is found to be unfit for play, and for other unusual causes such as bees. Bee delays and cancellations have occurred in games such as the spring training game in 2005 that was canceled, as well as the 2009 Houston Astros - San Diego Padres game that was delayed in the ninth inning. However, rain is by far the most common cause for cancellations or stoppages of play. In case of rain out after the game has begun but before it is official, a rain check is issued; this dates to the 1870s, but did not become widespread until the 20th century.
when will a baseball game be cancelled due to rain
if it is raining heavily or if there is standing water on the field