The Avalanche sent top prospect Calum Ritchie to the Islanders in the deal, as well as a future first-round pick.

Brock Nelson has a lot of reasons to be feeling sentimental right about now. He plays his 900th game as an Islander at Madison Square Garden on Monday night, becoming just the fifth player in franchise history to do so. If he makes it as far as Saturday in an Islanders uniform, he’ll pass Bobby Nystrom to be fourth on the all-time list.

The New York Islanders, unable to reach agreement on a contract extension for Brock Nelson, dealt the veteran forward to the Colorado Avalanche on Thursday. Nelson and forward William Dufour were dealt in exchange for defenseman Oliver Kylington,