Coming back from the surgery proved to be more difficult than Letang, regarded as one of the best-conditioned Penguins, anticipated. For eight months, he was unable to exercise the way he normally would, which created a tough transition once he was back on the ice.
"I thought I was going to be fine," Letang said. "I thought I was going to get over the hump maybe in the first few weeks of the season. It didn't happen that way. It took a little bit more time."
Letang said he didn't notice his skills diminish but said he would find himself tired during the second game of a back-to-back. That led to some frustration, which further hindered his game.
"I think that was a little bit of the story of my first half," he said. "It was one good game, one bad game. It was tough to build, because you just remember the bad ones."
Penguins coach Mike Sullivan also noticed Letang's inconsistency but still regarded him as one of the best at his position in the NHL.
"[Letang] is an elite defenseman," Sullivan said. "I think when you look at what he's had to overcome to play this season, it was a big challenge. … He had some stages in the year where he was really good for us. He had some other stages where he wasn't at his best. It was more just his consistency of play.
"But by no means does it diminish what we think of Kris as a player. He's an elite defenseman, and he still is. So he had a particular challenge this year that most players don't have to go through."
Pittsburgh captain Sidney Crosby doesn't doubt Letang will return to form next season.
"I think the injury that he had to overcome and what he was able to do this year was pretty incredible," Crosby said. "So I think that he's a competitive guy. I know that nobody likes to have a long summer. He'll be ready to go next year."