Yankees centerfielder Aaron Hicks warms up during spring training workouts at...

Yankees centerfielder Aaron Hicks warms up during spring training workouts at George M. Steinbrenner Field in Tampa, Fla., on Feb. 19. Credit: Newsday/Thomas A. Ferrara

TAMPA, Fla. — Yankees centerfielders past, present and future were the hot topic of the day on Sunday at Steinbrenner Field and two other points in Florida.

 The day began with two squads of Yankees players heading out for road spring training games. One group went to Clearwater to play the Phillies and another pinstriped posse boarded a bus for Sarasota to take on the Orioles.

Back at the home office, current centerfielder Aaron Hicks received his second cortisone shot in six days in his ailing lower back. Hicks will start the season on the injured list.

Hicks was supposed to be out a day or two when his back started acting up on March 1, but it never got better. The Yankees hope Hicks will return to the lineup for the second series of the season against the Tigers, which begins on April 1.

““There’s still a little bit in there and we just want to make sure this isn’t something that lingers during the season,” manager Aaron Boone told reporters in Clearwater. “But with that, that will definitely take him out of being ready by Opening Day. Hopefully this will knock it out once and for all.”

Former starting centerfielder Brett Gardner, who is batting .455 with three home runs and a 1.345 OPS in spring training, will man his old position when the season opens on March 28 at Yankee Stadium against the Orioles.

Hicks’ absence could mean the Yankees keep both Greg Bird and Luke Voit on the roster, with one playing first, the other serving as the designated hitter and Giancarlo Stanton replacing Gardner in left.

“Possibly,” Boone said. “But the game has a way of unfolding in some unusual ways and we’ve got eight days left in the spring and then the early days of the season, where things kind of change and evolve. We’ll see. The good news is both guys look really good.”

Another former Yankees centerfielder, Jacoby Ellsbury, reported to Steinbrenner Field on Sunday. Ellsbury missed the opening of spring training because of a case of plantar fasciitis.

Ellsbury — whose Twitter bio refers to him as “CF for the New York Yankees” — did not play last season because of multiple injuries. He had surgery last August to repair a torn labrum in his left hip. The 35-year-old is owed a guaranteed $47.2 million in salary for this season and next (that total includes a $5-million buyout for 2022).

Ellsbury had a physical on Sunday, after which he declined to talk to reporters, saying the Yankees preferred to have him interviewed on Monday.

“Good to see Jacoby,” Boone said. “Making progress. He's going through his physical, blood work, all that kind of stuff today. Just continue to rehab the hip. He's hitting off a tee now, playing catch, not from a big distance. Hopefully slowly moving toward getting introduced back to baseball activities.”

A few lockers over from Ellsbury, top prospect Estevan Florial was chatting on the phone wearing a brace on his right wrist.

Florial, 21, whom the Yankees hope will be the centerfielder of the future, suffered a non-displaced fracture when he crashed into the centerfield fence going after a triple on Saturday.

Florial, who missed half of last season because of a broken hamate bone in the same wrist, will undergo an MRI on Monday to determine how long this new injury will keep him out. He said he was told he will not need surgery.

 Florial stayed in the game after he was injured but was replaced by a pinch hitter in the next half-inning. “It hurt me right when I fell down, but it wasn’t like a big thing,” he said. “But when I got to the dugout, it was hurting me a little bit more. That’s where the trainer went and took me out.”

With all of the main Yankees outfielders either injured or getting the day off, infielder-by-trade Tyler Wade started in center in Clearwater and 29-year-old minor-leaguer Billy Burns started in center in Sarasota.

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