Jon Berti, who had been out since a left calf strain on May 24, was summoned and did not know how he would be used.
The righty-hitting utilityman played third base and left field during his rehab assignment and would be a fit against lefty pitchers.
It is possible that lefty-swinging Jazz Chisholm Jr. sits against some southpaws. The Yankees will face off against lefty Cole Ragans on Wednesday.
“I’m just excited to be here,” Berti said. “I’m just here to help the team any way I can.”
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Berti, who had stolen four bases in 17 games with the Yankees this year and led the majors in 2022 with 41 steals, also could become a late-inning pinch-runner.
With a crowded roster filled with players who expect playing time, Boone said he would “mix and match.”
“It’s all hands on deck,” Boone said. “We feel like our roster’s strong right now and capable and has a chance to do something really special. Feel like we got a little better today.