Reason: A new NHL rule states that goalies must wear leg pads that are proportional to their body sizes.
[NY Times]

Complex says: The rule change is mainly so that taller goaltenders can wear longer pads, where before they were restricted by a 38" limit. Kinda sucks for smaller dudes, though: The league says that 15 to 20 percent of goalies had to shorten their leg pads. Will this affect scoring? We guess we'll have to see if a few inches here or there really matter. Um, is that what she said?