NHL commissioner Gary Bettman said the league has only four unvaccinated players as it opens up the 2021-22 season.

Bettman was in attendance for the regular-season opener as the Pittsburgh Penguins beat the back-to-back Stanley Cup champion Tampa Bay Lightning 6-2 on Tuesday night.

"Everybody banding together to do the right thing," Bettman said. "Maybe that's why hockey is the ultimate team sport."