Stupid deal in sports history

What kind of deal is that?
http://www.hockeyliving.com/info/New_York_Islanders

New York Islanders sign Rick DiPietro to US$67.5-million 15-year deal (Canada.com)
New York Islanders goalie Rick DiPietro. (AP Photo/John Smock) UNIONDALE, N.Y. (AP) - Rick DiPietro re-signed with the New York Islanders on Tuesday, agreeing to a record 15-year deal that will pay the No. 1 goalie US$67.5 million.

This deal practically keeps the goalie from now to year 2022, when the deal is up, he will be a backup goalie who earns more than 4 million US dollars per year.