In the second inning of Monday's Labor Day game, Jason Castro took an awkward swing on a foul ball:
On the very next pitch he hit a ball down the left field line and appeared to run awkwardly to first base:
After a visit from the team athletic trainer and Bo Porter, Jason Castro was pulled from the game and Cody Clark inserted into the game as a pinch runner.
According to David Barron of the Houston Chronicle it's being called a right knee sprain, which is a bit of a concern considering that's the same knee that he had surgery on back in 2011:
Castro required surgery on his right knee in March 2011 after suffering a torn anterior cruciate ligament while trying to avoid a tag in his second spring training game of his second season in the big leagues. -David Barron
Here's what Brooks' has to say about the injury:
Same knee as the ACL/medial meniscus.
Knee didn't look too bad. I doubt any structural damage. ACL or LCL are the most likely ligaments to be sprained.
A few days rest is most likely, but wouldn't be surprised at a short DL stint. I wouldn't be concerned about it.
Castro was 2-2 on the day with two runs batted in and a run scored.