"According to sources who were at Delaware Park on Monday, Vazquez approached McCarthy as he was weighing in after the fourth race, the two exchanged words and Vazquez hit McCarthy multiple times. Vazquez then left the premises before being arrested later in the day. McCarthy, who was checked out by track medical personnel, did ride his remaining two mounts on the card."
http://www.drf.com/news/leading-trai...assault-jockey