The extent of the injury is not known and the team says Cueto will be re-evaluated tomorrow. Cueto appeared to grimace in pain after a pitch with one out in the fifth inning and called for a trainer. He threw one warmup pitch but did not look comfortable. The Reds trainer was seen massaging his upper right arm.
If Cueto can't make his next start, the team is likely to turn to Tony Cingrani, who has a 1.63 ERA in 209 2/3 minor league innings in his career.
Cueto allowed one earned run on two hits and a walk over 4 1/3 innings against Pittsburgh. Alfredo Simon came in to relieve Cueto, but gave up three singles as the Pirates took a 2-1 lead.