Bears are known for their gnarly teeth and the sweeping right hook they throw with those big paws. When in the wild, the reserved personality of bears usually makes them a rare site. However, should you get a bit too close to try and get a great picture to send to the family, the threatened king of the forest will rise up on its hind legs and overpower you with the gnashing of its teeth and that all-too-familiar swipe of its long, pointy claws.
In baseball, the relief pitcher could be what you'd call the bears of the team.