The Pistons announced on Thursday (Jan. 2) that Ivey underwent successful surgery to repair a broken fibula in his left leg, and he will be re-evaluated in four weeks, per Keith Langlois of the Pistons' official site.
Capela, who has been ruled out ahead of Thursday's (Jan. 30) game versus Cleveland, didn't travel with the Hawks for the start of their three-game road trip, per Brad Rowland of the Locked On Podcast Network.
Johnson was diagnosed on Wednesday (Jan. 29) with a torn labrum in his left shoulder and will miss the rest of the season, league sources tell NBA reporter Chris Haynes.
The Hawks announced Zeller has yet to suit up this season due to personal reasons. Until Atlanta provides a timetable for his return, the veteran big man can be considered out indefinitely.