Jay Jackson hurt his left hamstring when he ran to cover first base in the ninth inning of a game against the Chunichi Dragons at Mazda Stadium on September 15. He was immediately removed from the game.
The Hiroshima Carp do not think the injury is serious. He is expected to go to the hospital for tests.
[UPDATE 9/17 @ 5:18pm]
Jackson was taken off the active roster on September 16.
Source: Sanspo 9/16/2018