The New York Islanders announced their signing of Greiss on Wednesday, the opening day of free agency in the NHL.
Greiss posted a 9-6-3 record with a .908 save percentage and a 2.59 goals-against average with the Pittsburgh Penguins. The German played 25 games the previous season with the Phoenix Coyotes. The San Jose Sharks selected Greiss in the third round (94th overall) of the 2004 National Hockey League Draft. In 89 career NHL games with San Jose, Phoenix and Pittsburgh, he recorded a 36-30-11 record with a .913 save percentage and a 2.47 goals-against average.