Not everyone playing by the spirit of tanking guideline

After 20 years in the NBA, Dirk Nowitzki can’t be fooled.

He knows when teams aren’t giving an honest effort, when they are out there playing but not playing to win.

“It’s pretty obvious,” Nowitzki said.

Easy to spot, the NBA is finding tanking not so easy to stop.

It’s a problem for the league office, which has fined owners, chastised teams and sent out league-wide memos on the topic. And with big brother watching, teams are abiding by the letter of the law, but arguably not the spirit of its intent.

Tanking is viewed as a solution — sometimes the only one — for some teams and their fans, hoping something good can come from being bad if they cash in at the lottery and land a top draft pick.

Nearly a third of the 30 NBA teams are brutally bad this season and it’s hard to believe some aren’t losing on purpose. Phoenix, Memphis, Atlanta, Orlando, Dallas, Sacramento, Brooklyn, Chicago and New York should all lose 50 or more games, and only the Nets aren’t motivated to lose — they don’t own their firstround pick.

Everyone else comes under suspicion when something strange happens:

• What was leading scorer Dennis Schroder doing on the bench for the entire fourth quarter of Atlanta’s one-point victory over Phoenix on March 4?

• Why did Tyreke Evans foul Chicago rookie Antonio Blakeney attempting a three-pointer with 1.8 seconds left and Memphis leading Chicago by one?

• Are some of these guys on injury lists really hurt?

New York hosted its own version of March Badness over the last week, with the Knicks and Nets both playing Nowitzki’s Mavericks, before Memphis and Chicago came to the city on the same sad Monday. That’s five of the nine bottom teams — including the only two known to have been contacted by the league office because of their tactics.

Tanking is a discussion for fans and media. Nobody from a team ever dares talk about losing on purpose.

Except Mark Cuban. When the Dallas owner went on Hall of Famer Julius Erving’s podcast in February and said he told his players that “losing is our best option,” the league fined him US$600,000 for “public statements detrimental to the NBA.”

That put a spotlight on the Mavericks. So if they were planning on packing it in and trying to add more young legs in the draft for Nowitzki’s expected swan song, they had to change plans.

“Well, I think Mark messed that up for us,” Nowitzki said, with a straight face.

If the Knicks are tanking, they are being out-tanked.

New York went 1-16 in a recent 17-game stretch, managing only to beat fellow lottery-bound Orlando, in a freefall that should’ve been able to take the Knicks close to the bottom. Instead, they remarkably remain the best of the worst, remaining ahead of the other eight in the standings — which means, behind them in lottery odds.

Chicago came to New York on Monday night without Zach LaVine, Lauri Markkanen and Kris Dunn, its three top scorers. Bulls coach Fred Hoiberg said they were all hurt, and people down the street at the league office were likely wondering.

When the Bulls stopped playing starters Robin Lopez and Justin Holiday earlier this season, the league reminded them of the new resting rules, which allow commissioner Adam Silver to fine teams who sit multiple healthy starters in road games.

So the Bulls started playing Lopez and Holiday again — sort of.

They went the whole first quarter at Detroit on March 9, combining for 15 points as the Bulls led by five. Neither got off the bench again, and the Pistons outscored them by 21 the rest of the way.

But Hoiberg wasn’t worried about creating any further trouble by playing without the three players acquired in the Jimmy Butler trade with Minnesota last summer. He insists they were injured.