According to the Ottawa Sun, the injury occurred during offseason training last month in Montreal.
Michalek, 27, is coming off the best season of his NHL career, when he set a career-high with 35 goals and totaled 60 points for just the second time in eight seasons. His 10 power-play goals also tied for the team lead.
For us it's a little bit different. I've never been in front of this much media. This is more than we've ever had to deal with in Tampa. I guess we're on a little bit bigger stage now. It's nice, you have to enjoy it. This doesn't happen too often.
— Lightning forward J.T. Brown after his first Media Day experience on Tuesday in preparation of Game 1 on Wednesday