Brendan Gallagher is off to the locker room after a scary slide into the boards. It appears his left knee may be injured. Here is the clip: <div align='center' class='pl20 pr20'><blockquote class='twitter-tweet' data-lang='en'><a href='https://twitter.com/NathanGraviteh/status/1583975136939548672'> </a></blockquote></div>