JR Hildebrand, who crashed while leading on the last lap of the Indianapolis 500 two weeks ago, suffered a torn ACL in his left knee Wednesday afternoon at Texas Motor Speedway, sources confirmed Thursday. The only statement by Panther Racing officials is that Hildebrand suffered a knee injury, but they did not want to comment further. Read more: http://sports.espn.go.com/rpm/racing/indycar/news/story?id=6644739