PITTSBURGH — Stylistically, there are issues. A running game that seems to be all or nothing. A secondary that hasn’t been nearly as consistent as it was in 2019. A defense that seemed to have a strange aversion to getting off the field on third down.

And an early schedule littered with teams either rebuilding or underachieving or both.

Yet Mike Tomlin doesn’t get caught up in style points. All the Pittsburgh Steelers coach knows is his team is undefeated through four games for the first time in 41 years after a 38-29 victory over Philadelphia on Sunday.

“It wasn’t a perfect performance by any stretch,” Tomlin said. “But we’re not looking for perfect. We’re looking to be good enough to win.”

That’s something that hasn’t always been the case for Pittsburgh during the opening quarter of the season in Tomlin’s highly successful tenure. The Steelers have frequently stubbed their toe in September and early October during his 13-plus years on the job.

In 2017, a team that finished 13-3 fell on the road in Week 3 to a Bears club that went 5-11. In 2016, a group that captured 11 games and reached the AFC championship was blown out in Week 3 by an Eagles team that wound up 7-9 under first-year head coach Doug Pederson and rookie quarterback Carson Wentz. In 2014, the eventual AFC North champions were stunned at home in Week 4 by a Tampa Bay team that earned the No. 1 pick in the 2015 draft after going 2-14.

Tomlin likes to describe the momentum of each season as a “moving train.” Typically Pittsburgh takes its time getting it together. Not so much in 2020. Sure, the combined record of the four teams they’ve played so far is 3-15-1. Given their track record of occasionally spotty work against seemingly overmatched opponents, they’ll take it.

So forgive cornerback Steven Nelson if he isn’t losing sleep over how the secondary has looked vulnerable, including a curious performance against an undermanned Philadelphia wide receiving corps missing DeSean Jackson and Alshon Jeffery. Travis Fulgham caught 10 passes for 152 yards and the Eagles converted 10 straight third downs at one point to rally from 17 points in the third quarter to nearly steal it late.

“We’ll clean it up,” said Nelson, who picked off Wentz twice, including a desperation heave in the final minutes to seal it. “We got the win, that’s all that matters.”

The task figures to get tougher starting next Sunday when the surging — yes, surging — Cleveland Browns (4-1) visit.