Here's a partial list: MLB Concussions | The Concussion Blog The same blog has 2011 totals here: MLB Concussion Wrap Up 2011 | The Concussion Blog and a partial 2012 total here: 2012 MLB Concussion Update #1 | The Concussion Blog 2013 totals are here (I'm pretty sure these figures didn't change in the last month): For catchers, concussion dangers all too real The total is: Catchers: 20 All others: 34 That's 37% of confirmed concussions since 2001, according to the above data, were catchers. And most, maybe all of them, were on foul tips (I know all 10 in 2013 were sustained on foul tips). Also, this: Chirinos facing long comeback from concussion Scary stuff. I have read, however, that some of the catchers in 2013 switched to titanium masks before being concussed, and then switched to steel after. Steel has more flex and might be a safer material concussion-wise, but I don't know if it reduces the risk to zero.