With the Cubs supposedly fine-tuning things for postseason form, ace Jake Arrieta was roughed up by the Pittsburgh Pirates in an 8-4 loss Wednesday night.

Pirates first baseman John Jaso hit for the cycle, and Arrieta (18-8) gave up 7 runs and 10 hits — both season highs — in 5 innings. But manager Joe Maddon said there isn’t cause for concern that the Cubs’ starter won’t be able to right the ship come October.

“That was probably the best strike-throwing I have seen out of him,” Maddon said. “He was throwing very well. Up until the home run by Jaso, there’s just a couple singles to the opposite field. That was it. Then, the last inning kind of got away from us, too. But he wasn’t that bad today. None of it made sense to me.”

The Pirates hit 3 consecutive doubles to score 3 runs in the sixth inning and Jaso’s 3-run homer in the fifth did the majority of the damage.

“It felt like a spring-training game from the get-go, just wasn’t crisp and didn’t have much working,” Arrieta (18-8) said. “That’s about it.”

The Cubs haven’t made a plan yet for when Arrieta will pitch next. He is not scheduled to make another start in the regular season. Arrieta said it doesn’t matter to him when he pitches next, he’s just focused on the postseason.

“We’re moving on,” he said. “I don’t like giving up 7 runs. I’m (mad) about that. but moving forward, everything is fine. I’ll throw sides up here, and whoever I face in the first round, they’re going to be in trouble.”

Jaso’s triple in the seventh inning gave him the first cycle in the 16-year history of PNC Park.

The triple off reliever Pedro Strop clinched the Pirates’ first cycle since 2004. The last Pirate to hit for the cycle was Daryle Ward on May 26, 2004, in St. Louis. The last Pirates’ home cycle was by Jason Kendall on May 19, 2000, against the Cardinals at Three Rivers Stadium.

Jaso isn’t exactly a typical candidate for the cycle. He has neither prodigious power nor speed, as he hit just his seventh home run and third triple of the season.

Jaso didn’t even realize what had happened until he already had performed the feat.

“It didn’t really dawn on me until I was standing on the base,” he said. “I was looking at (third-base coach Rick) Sofield and it finally just hit me.”

Against Arrieta, Jaso singled in the second inning, hit the 3-run home run in the fourth and doubled in the fifth.

“It’s just a great memory to have,” Jaso said. “You don’t really want to take this blessing for granted being here.”

The Cubs’ Anthony Rizzo hit a solo homer, his 32nd of the season.