With the bases loaded and two outs in the sixth inning, Puig tracked a fly ball into foul territory in right field before leaping into the wall to make the catch.
Puig immediately fell to the ground in obvious pain, clutching at different parts of his body. He initially remained in the game but was replaced in right field to start the eighth.
Reds manager David Bell said Puig is day-to-day and is hopeful he'll avoid a stint on the injured list, according to Joe Danneman of FOX19 in Cincinnati.
Puig will visit the doctor again Monday, Mark Sheldon of MLB.com notes.
The 28-year-old has struggled at the plate this season for the Reds, exiting Sunday's contest with a .206 average and .611 OPS.
Puig has been above average in the field, though, with a plus-3 in defensive runs saved, according to FanGraphs. He's also tied for the team lead with three outfield assists.