An X-ray was taken, and after Kolek was examined, it was recommended that he not throw for a week. At that point, he will be re-evaluated.
The 18-year-old from Shephard, Texas, was making his fifth start since joining the Gulf Coast League team. He is 0-2 with a 4.50 ERA, with 10 strikeouts in 10 innings.
Wednesday's game was suspended due to inclement weather.
Joe Frisaro is a reporter for MLB.com. He writes a blog, called The Fish Pond. Follow him on Twitter