### Instruction:
Who won the 2018 NHL Stanley Cup Finals?

### Response:
The Washington Capitals won the 2018 Stanley Cup on June 8th, 2018. They defeated the Las Vegas Golden Nights 4 games to 1 in a best of 7 game series. The Capitals were coached by Barry Trotz and led by team captain, Alex Ovechkin, who won the Conn Smythe Trophy as Most Valuable Player.