home plate collisions have always been a part of the game back in may, 2011, a young start buster postyerved a crushing blow on this plate. the giants' all time catcher suffered a fractured leg and missed the rest of the season. but his manager maintains this new rule is not about posey. >> i am not going to put this on buster. he's not the guy responsible for this. to see gary bennett laying there, i thought he was paralyzed. >> concussions are a potential by-product of home plate collisions, and it seems as though major league baseball is looking to get ahead of its problem. >> now that we have everything that we know about con discusseconcussions,that's why s being more cautious. >> if you watch me walk you'll say, man, it looks like he took some home plate collisions. i, back, hip issues, part of it is catching and that goes with the territory, but when mike talks about his concussion issue, and how he turned from a 30-year-old man into a 60-year-old man because of getting hit in the head, it's time to make some adjustments. >> that's michael yves reporting. the new rule goes into e