Their coach complains they have been “playing in mud.” Their franchise player acknowledges a team-wide funk. Their All-Star point guard is out with a sprained left ankle, and the third leg of their Big Three is mired in one of the worst shooting slumps of his life.

Imagine if the Spurs weren’t 50-16, headed to the playoffs for the 16th consecutive season and had real problems to bear.

“We just don’t have the best rhythm right now,” captain Tim Duncan said. “We’re just sporadic, and that’s a concern.”

If the Western Conference’s first-place team has shown anything since returning from last month’s rodeo trip, it’s that not all 50-16 records are created equal.

Last season, the team finished a lockout-shortened campaign with that same mark, then headed to the playoffs feeling like a legitimate championship contender.

This season, the Spurs have won 50 of 66 again — and are less than thrilled with the way they’ve been playing.

In the past week, the Spurs have surrendered a season high in points (in a 136-106 loss to Portland) and matched a season scoring low (in a 103-87 loss at Minnesota). Thursday night, they bounced back — mildly — with a 92-91 victory over Dallas they nearly fumbled away at the finish.