"We're just glad we caught it. Now, in a perfect world, do you wish this never happened? Yes," Cooper said. "But obviously the timing's terrible for him too, because he's been a big part of why we are in the playoffs obviously. And for him to, well for sure miss the first round, I know it's killing him."
Tampa Bay played Tuesday without injured defensemen Victor Hedman and Anton Stralman, and forward Ryan Callahan.
"We've really run into the injury bug here of late," Cooper said. "We expect Victor back; whether he's going to play these last two games or not … this is probably a little bit more of body maintenance for him because we need him healthy for the playoffs. But to have a guy like him out, and Callahan, it's tough, and so it really tests your depth as an organization, and unfortunately we're missing some big guns but hopefully we can slowly get them back for the playoffs."
Stamkos, who had 36 goals and 64 points this season, can become an unrestricted free agent July 1. Cooper said the situation never came into the locker room.
"It's been just business as usual," Cooper said. "That's what makes [Stamkos] a great pro. Everyone just knows these are situations that it's also a business. It's a game, but it's business. But it hasn't let anybody affect our team, that's for sure."