According to Bob McKenzie of TSN:
Gary Roberts’ NHL career is over.
Unclaimed on waivers on trade deadline day, the 42-year-old veteran will not play another game with the Tampa Bay Lightning this season. He had already announced that he would retire at the end of this season.
A formal announcement of Roberts’ retirement is expected from the Lightning.
I was actually surprised that someone didn't pick him up off of waivers for the final stretch and possibly the playoffs. He's one of the true warriors to have played in the NHL.
Here's Gary Roberts at the age of 41 man-handling Ben Eager last season: