The team confirmed the news on Twitter saying, “Initial X-rays on Corey Kluber revealed a non-displaced fracture of his right ulna.”
Kluber will be reevaluated in Cleveland Friday to confirm the diagnosis and assess a timetable for his return.
According to MLB Statcast, the ball left the bat at 102.2 mph before striking Kluber’s right forearm.
The ball then rolled away from Kluber, and he tried to swat it to first base with his glove rather than throwing it as Anderson reached on an infield hit. Kluber briefly visited with a trainer before walking off the field with the Marlins leading 3-1 in the fifth inning.
Kluber, a two-time American League Cy Young Award winner, entered the game 2-2 with a 5.81 ERA.
The Indians are already without starter Mike Clevinger, who is out until at least June with a back injury.