Datsyuk, who turns 38 on July 20, had one year left on a three-year, $22.5 million contract with Detroit. The NHL salary-cap charge associated with his contract ($7.5 million) would count against the Red Wings' salary cap for the 2016-17 season.
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His agent, Dan Milstein, said Datsyuk did not take a $2 million bonus he was owed in February, which Milstein said was contingent on Datsyuk playing in the NHL in 2016-17. However, that has no effect on the salary-cap charge.
"I made it a tough situation on my team, but I believe in our management," Datsyuk said. "They are the best in the NHL. They [will] make this happen."
Red Wings general manager Ken Holland said Saturday a few NHL teams expressed interest in trading for Datsyuk's contract, but he was skeptical a trade would happen because of the additional assets it would cost Detroit to clear salary-cap space for one season.
"We'll see if I can move the contract," Holland said. "I'm not overly optimistic. ... Certainly you're going to be compromised by having $7.5 million tied up in a player that you don't have. It's a huge loss, it's a huge hole, and it's a very, very difficult situation."
Holland said Datsyuk will sign NHL retirement papers, making him ineligible to return next season.
Datsyuk said he made his decision during a recent vacation after he helped Russia win the bronze medal at the 2016 IIHF World Championship in May.