Home plate umpire Jeff Nelson was forced to leave Tuesday's American League Championship Series game between the Houston Astros and New York Yankees after suffering a head injury, according to Bleacher Report's Scott Miller.
Nelson was hit in the mask by a foul ball during the fourth inning. While he initially remained on the field, he eventually left the game in between innings, causing a slight delay.
Per James Wagner of the New York Times, Kerwin Danley replaced Nelson behind home plate.
This article will be updated to provide more information on this story as it becomes available.