The Yankees’ new cleanup hitter lasted seven innings Wednesday night.

Gio Urshela, who earned the promotion by being one of the few productive Yankees in a struggling lineup, exited the 4-1 loss to the Braves at the Stadium with lower back tightness and is “day-to-day,” according to Aaron Boone.

“I think it just locked up a little bit on him, probably in the cold, before his last at-bat,” the manager said. “I think even maybe could have continued, but we’ll see how he is after getting some treatment here. I don’t think it’s anything too serious.”

Boone said Urshela, who went 1-for-3 with an infield single, was not scheduled to undergo any tests.

The Yankees are close to having their COVID-19 protocols relaxed.

The club is nearing the point at which 85 percent of its traveling party will have hit two weeks out from being fully vaccinated — the threshold MLB has set as a marker to have certain health and safety protocols relaxed.

Boone estimated the Yankees were near 84 percent. A spokesman added they are waiting on a handful of Tier 1 personnel to clear the 14-day grace period following their second shot — or the single Johnson & Johnson dose. The majority of the Yankees hit 14 days out Wednesday.

Once the Yankees hit 85 percent, they won’t have to wear masks in the dugout and bullpen and can eat indoors at restaurants, among other changes. Vaccinated players also will not have to sit out because of contact tracing if someone on the club tests positive for the virus.

Steve Kalafer, owner of the Yankees’ new Double-A affiliate Somerset Patriots, died Wednesday from cancer. He was 71.

Kalafer founded the Bridgewater, N.J.-based Patriots in the independent Atlantic League in 1998 and maintained close friendships with Joe Torre, Willie Randolph, John Sterling, Suzyn Waldman and other figures in the Yankees organization as he became a regular at the Stadium. The Patriots will make their affiliated minor-league debut on May 4.

“Every time I set foot in the ballpark, I will think of him with an unbelievable amount of love, respect and appreciation,” Patriots manager emeritus Sparky Lyle, the former Yankees great, said in a statement. “He was the Somerset Patriots, and it will be up to all of us to carry his vision long into the future.”

The Yankees optioned RHP Brooks Kriske to the alternate site after he gave up a home run and two walks in the ninth inning

— Additional reporting by Ryan Dunleavy