Updated 6:05 p.m.: Yankees manager Aaron Boone said he expects injured center fielder Aaron Hicks (lower back pain) to be ready for Opening Day.

“I’m not concerned,” Boone said Tuesday night, before a game against the Orioles at George M. Steinbrenner Field. “There’s a level of concern, but I’m confident we’re treating it conservatively and making sure it’s all out of there so that he can hit the ground running. I’m not too worried about it but any time one of your players is out for an extended period, you’ve got to have some level of concern.”

Earlier in the day, Hicks said he had a cortisone shot in his back Monday and that he would be shut down for several days. Boone said he believes Hicks could get in a game this weekend.

Hicks hasn’t played since March 2. Opening Day is March 28.

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TAMPA, Fla. — On Sunday, Yankees manager Aaron Boone said his ailing center fielder Aaron Hicks had a “good” day in his recovery from back soreness. Boone said Hicks played catch, took swings from both sides of the plate and ran.

Yet, the next day, the 29-year-old — whom the Yankees gave a seven-year, $70-million deal this spring — received a cortisone shot that will halt him from continuing baseball activities until later in the week, he said in the clubhouse at George M. Steinbrenner Field on Tuesday.

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Why did Hicks need a cortisone shot?

Hicks hasn’t played since hurting his back March 2.

“Something like this that’s been lingering, got to do something about it,” he said.

What’s the big problem?

Hicks said that throwing was a “big issue” for him. And on Sunday, he said he was able to throw and hit without “too much pain,” but there was a problem hitting. “I still had restrictions in mobility in my swing,” he said. “So that’s kind of where it got sketchy.”

Is Opening Day in jeopardy?

The Yankees will already have to big parts of their team on the disabled list on Opening Day. Starting pitchers CC Sabathia (knee) and Luis Severino (rotator cuff soreness) each won’t be ready for the Yankees’ first game of the season vs. the Orioles on March 28.

Hicks said he thinks he’ll be able to play.

“If I need to get at-bats, I can just go down to the minor-league side, crank out a lot of at-bats with them, but no, I feel pretty good today,” Hick said. “No pain is a big thing for me, especially when it comes to swinging. Until I start doing something like that is when I’ll know for sure.”

And he’s the full quote from Boone on Sunday. Boone will speak to reporters before Tuesday night’s game against the Orioles.

“Hicks had a good day (Sunday),” Boone said. “He’s been kind of the same the last couple of days. (Sunday) he got out and ran. Got a sweat going. Played catch, took swings from both sides. So, he’ll see the doctors still (Monday). Just to kind of cross all the T’s and dot all the I’s. He had a pretty good day (Sunday). So hopefully on the upswing and see where we’re at (Monday) and Tuesday.”

Brendan Kuty may be reached at bkuty@njadvancemedia.com. Follow him on Twitter @BrendanKutyNJ. Find NJ.com Yankees on Facebook.