Players get caught off guard, and sometimes, they don't like that, so they fight about it. Other times, they just don't like each other. And they fight about that, too. You mostly expect the fights to happen on the ice — not in the stands.

Gregor and Ostapchuk were both acquired by the Sharks from Ottawa on Friday in the deal that saw winger Fabian Zetterlund and AHL forward Tristen Robins to the Senators organization.

An angry fan tried throwing down with SJ Sharkie, the popular mascot of the NHL's San Jose Sharks, on Tuesday.

There were two fights on the ice in the San Jose Sharks' matchup against the Nashville Predators on Tuesday. There was almost another in the stands when a fan took exception with the Sharks mascot. A viral video of the incident shows one fan trying to square up with S.