According to an 8 year study it was determined that there were sigificantly more injuries to players and that they were MORE likely to injure their legs and ankles on artificial turf than on grass/sod.

Players were 27% more likely to sustain lower extremity injury when the game was played on an artificial surface instead of the real thing............

More specifically, there was an 88% increased risk of injury to the anterior cruciate ligament and a 32% increased risk of an eversion ankle sprain on turf. This data was compiled in an 8 year study and presented at the American Academy of Orthopaedic Surgeons during their meeting...........