Yurisbel Gracial hurt his left hand while returning to first on a pick-off play during a game against the Seibu Lions at YafuOku Dome on May 24. He was examined at a hospital in Fukuoka on May 25 and diagnosed with a proximal phalanx fracture in his left ring finger. He will most likely need about two months for a full recovery.
[UPDATE 6/29 @ 10:47pm]
Gracial is slated to return to Cuba temporarily for the 2018 Central American and Caribbean Games in July. He will rejoin the team in August.
Source: Tokyo Sports 6/29/2018