Tampa Bay Lightning all-star center Steven Stamkos received positive news on Tuesday when results from an MRI on his left shoulder showed no structural damage, ruling out the possibility of surgery.

Though the injury is not considered serious, Stamkos has decided not to play for Canada at next month's World Championships in Sweden and Finland.

"I'm going to rest the shoulder,'' Stamkos said.

Stamkos said on Monday during the Lightning's exit interviews he was not sure when he injured the shoulder,

Stamkos, who played the final month of the season with the injury, said Monday during exit interviews he wasn't sure when it occurred, but that he nearly had to miss the March 10 game against Carolina.

Stamkos remained in the lineup, scoring 12 goals over the final 15 games to become the 20th player in NHL history to record 60 goals in a season. He scored the 60th in the third period of Saturday's season finale at Winnipeg.

Stamkos also kept intact his streak of never missing a game because of injury in his four NHL seasons.

"That's why we work hard during the summer and then try to take care of your body as best you can during the season, so you can play,'' said Stamkos, who has appeared in 279 consecutive games since sitting out three times as a healthy scratch as a rookie.

"You learn and mature as a player and as a person throughout your career, so you learn when to rest and what to eat and all that comes along with taking care of your body and staying healthy. And part of that is knowing how to play through (injuries).''

Stamkos has not had a long summer off during his career. After his rookie season in 2008 and again in 2009 he participated in the World Championships for Team Canada. Last season, the Lightning reached the Eastern Conference final, which went seven games through the end of May