Young sustained the injury late in the fourth quarter on a drive to the basket. He planted his left foot and came up in pain afterward.
He limped to the sideline and eventually left for the locker room. The Hawks quickly ruled him out with what the team called a "left calf contusion." After the game, Young was hopeful that he could return to the court soon.
"Hopefully," Young said about his availability for Wednesday's game against the Brooklyn Nets. "I don't know. We'll see."
He also said he got kneed in the calf on the play, clarifying that it wasn't a non-contact injury.
The Hawks had little to play for when Young left the game. They trailed 126-106 with 4:15 remaining when Young left the court.
The Pacers won, 129-114 to improve to 18-17 and pull a half-game ahead of the Hawks, who dropped to 17-17 with the loss. Young, a two-time All-Star, is averaging 27.5 points and 9.9 assists while shooting career lows from the field (41.5%) and 3-point distance (31.1%).