Catchers' Head Injuries Ignored in Baseball's Early Years - The New York Times
Baseball, softball players should wear helmets to prevent brain injuries: study - The Globe and Mail
Umpire Manny Gonzalez leaves Rays-Red Sox game after being struck in facemask by foul tip Umpire Manny Gonzalez leaves Rays-Red Sox game after being struck in facemask by foul ball
The Year of Living Less Dangerously
NY Taxpayers to Fund Most of $1.4 Billion Buffalo Bills Stadium
An Umpire Took One Too Many Foul Balls to the Face. He Invented a Solution. - WSJ
Major league umpires wear wristbands to protest 'escalating verbal attacks' from players
Close Call Sports & Umpire Ejection Fantasy League: 17 June 2012
Analysis of Baseball-to-Helmet Impacts in Major League Baseball - Aravind Athiviraham, Adam Bartsch, Prasath Mageswaran, Edward C. Benzel, Brian Perse, Morgan H. Jones, Mark Schickendantz, 2012
Midwest Ump: Equipment Worn By Some MLB Umpires
List of face masks worn by active MLB Umpires as of 6/21/2012 - Umpire Equipment - Umpire-Empire
How to Choose Catcher's Equipment
How NHL refs played by the tough guy code and are now paying the price, NHL