Initial tests ruled out any fractures. The team expects X-Ray and MRI results on Wednesday, and Castro will be evaluated further.
Castro was injured in the first inning of Chicago’s 7-1 victory. The shortstop scored from second on a Jorge Soler single but his left ankle bent as he slid into home place. Castro did not return to the game and was replaced at shortstop by Javier Baez.
"It just looked very awkward," Cubs manager Rick Renteria said to MLB.com. "Any time you see somebody cringe in pain, you grab yourself a little bit. He didn't want to come out of the game. That's a good sign."
Castro is batting .292 with 14 home runs and 65 RBI this season.
- Scooby Axson