It forced younger, less experienced players to fill the vacancies.
"The players replacing those [injured] players are not as good as those players," Holland said. "Those are NHL players. It's a small margin for error, so when we don't take care of things we can take care of, and then lose so many people for so long, it all adds up."
The effects were also compounded by not having as many elite players as seasons past, when the loss of a role player could be mitigated by the great players still in the lineup. Last season, the Red Wings had 18 players miss time with injuries and finished with 307 man-games lost.
"There was a time when we had four or five superstars on the team, so if you had some injuries, it didn't bother you," Holland said. "Well, that's not who we are today. We're going to have injuries. We expect to have injuries, but you're hoping you're in the middle of the pack in the League in injuries versus leading the League in injuries."
The Red Wings hope to have better consistency on the power play, where they finished 27th in the League at 15.1 percent. Detroit was also 26th in scoring (2.41 goals per game) and forward Tomas Tatar was the only player with at least 20 goals (25).
"We didn't score enough last year, and I can't tell you if we're going to score more this year," Holland said. "Certainly, the power play's got to produce more. If you think that you're going to go into a game and you're not going to score a power-play goal, and the other team is going to score a power-play goal, to think that you can beat them by two goals at 5-on-5 … you're going to win enough games like that to make the playoffs. It's incredibly difficult."
It remains the goal in Detroit, though.
"We're going into training camp trying to compete for a playoff spot, trying to be in the mix," Holland said. "It's a very deep [Eastern Conference], and we know that if we're going to be better, we need internal improvement. We need some of our young kids to take a step. We need some of our people that had an off year last year to bounce back."