By Alek Arend Steve Kerr won five championships as a player. He’s tacked on four more as a coach. At this point, he knows not only how to win a championship – but also how to celebrate one. After arriving home last night, Kerr met with a few reporters. He admitted he’s hungover. “I’m not going to lie, I’m hungover,” Kerr said with a smile. “We had a great night last night. An incredible night. Late night.” As we said, the man knows how to properly celebrate winning a championship by this point. Kerr and the Warriors took care of the Boston Celtics in Game 6 of the NBA Finals. It never felt lik…