PITTSBURGH — Chicago Cubs manager Joe Maddon believes Anthony Rizzo’s slide that upended Pittsburgh Pirates catcher Elias Diaz at home plate on Monday is still perfectly legal. So does Maddon’s superstar first baseman.

Major League Baseball? Not so much.

MLB chief baseball officer Joe Torre informed both clubs on Tuesday that Rizzo should have been called for interference for swiping Diaz’s right leg while Diaz attempted to make a throw to first base to complete a potential double play in the eighth inning of Chicago’s 7-0 victory on Memorial Day.

Diaz’s throw ended up sailing into right field, allowing two runs to score. The Pirates challenged the call on the field but replay officials opted not to overturn it.

Nearly 24 hours later, MLB believes Rizzo violated Rule 6.01 (i), which states “if a runner does not engage in a bona fide slide, and initiates (or attempts to make) contact with the fielder for the purpose of breaking up a double play, he should be called for interference.”

Maddon called it the “perfect play” on Monday and didn’t back down.

“There’s nothing wrong with that play,” Maddon said. “Again the umpires got it right both in New York and on the field last night. Almost like a doctor reading an MRI. You might get two different opinions on the same set of information.”