Young had been a game-time decision Thursday night. And like prior to Game 4 on Tuesday in Atlanta, after testing his foot before the game, Young didn't feel comfortable enough to play, Hawks coach Nate McMillan said.
Young suffered the injury after stepping on the foot of referee Sean Wright late in the third quarter of Game 3. The third-year point guard is averaging 29.8 points and 9.5 assists in his first postseason appearance and 32.7 points in this series.
Young will continue to rehab with hopes of playing in Game 6 on Saturday in Atlanta.
The Hawks on Thursday weren't able to replicate the strong all-around performance that carried them to a win in Game 4 without Young, despite another good outing from Bogdan Bogdanovic (28 points). The Bucks, who scored just 88 points on Tuesday, exploded on offense behind big nights from Brook Lopez (33 points), Khris Middleton (26 points, 13 rebounds and 8 assists) and Jrue Holiday (25 points and 13 assists).
Hawks center Clint Capela started after being listed as questionable with right eye inflammation.
Capela is dealing with the aftereffects of catching an inadvertent elbow to the face from Bucks reserve guard Sam Merrill in the fourth quarter of Atlanta's Game 4 victory while the two of them were going after a rebound. He left the court with a towel pressed to his right eye. Capela was examined by the team's ophthalmologist after Tuesday's game and again on Wednesday.
Capela struggled in his 21 minutes in Game 5, finishing with just 6 points and 8 rebounds.