Aaron Boone, the Yankees’ new manager, said he often wakes up in the middle of the night with a new idea or concern. Boone said he dreams a lot about his job — but he didn’t say he has nightmares.

“I tussle with a lot of things on a daily basis,” Boone said. “Not necessarily all that I’ll share here, but you’ve got to have some degree of health.”

Nope, Aaron, sorry. Rules are rules. You can’t say health.

“I mean, if you’re asking me if I really like our team, the answer’s yes,” Boone said. “But there’s always concerns. There’s always things that I’m thinking about. I’ve talked about being really good at the details and the margins that I think help good teams become great teams.”

The best team of Boone’s playing career was the 2003 Yankees, a team with such a deep bench that Boone did not even start Game 7 of the A.L.C.S., which he ended with his famous home run. It was so deep in pitching that two relievers for that postseason — Jose Contreras and Jeff Weaver — soon pitched in rotations for teams that won the World Series.

Rotation depth might be an actual concern for these Yankees. C. C. Sabathia turns 38 in July, though he has learned to thrive with guile, not power. Masahiro Tanaka had that elbow problem in 2014, but he looked quite sturdy last October. As for Luis Severino, Sonny Gray and Jordan Montgomery — and all the power relievers behind them — what’s not to like?

“I felt good about our team last year, and obviously we had a really good year, but I do feel better about our team going into this season,” left fielder Brett Gardner said. “It’s a long season and we’ll see what happens, but I expect us to have a lot of fun together.”