But on Friday, Cehlarik finally returned to make his training camp debut, skating with David Krejci and David Pastrnak during a morning practice at Warrior Ice Arena.
"Obviously more fun to be back out there with the guys after a long summer," said Cehlarik. "Trying to get back on the ice healthy, felt good to be out there. Camp started today for me. I was out there with the skating coach [Kim Brandvold] and a couple injured guys. Just working hard to get back, had to be patient with it. But I'm healthy now."
Bruins head coach Bruce Cassidy said Cehlarik will not play in Saturday's preseason finale in Chicago, indicating that he will most likely start the season in Providence. Nonetheless, Cassidy can tell there has been marked progress in the former third-round pick's game since last season.
"He looks like he has improved his skating, he looks stronger, like a lot of kids his age. Looks like a good summer for him," said Cassidy. "This injury, unfortunately we didn't get a good look at him. I think he would have learned a lot from his time up last year. And whenever he does get back into our lineup, I think that will be a good, positive for him, having gone through it.
"We've always liked Peter. We won a lot of games with him in the lineup. We just made a decision late in the year, when we made a deal at the trade deadline to go with a more veteran guy."