In the Stanley Cup Playoffs players are bound to get beat up and take a few hits. Some get the worst of it and end up breaking bones, but instead of setting out the rest of the Playoffs most players play through it.
This may not seem like to much to some, but trying to play defence when you have an ankle sprain is a hard task. Radko Gudas would never want to miss a game especially in the Stanley Cup Final, and he was most likely playing through a concussion as well.