McGlothan agreed to a training camp deal with the Celtics on Wednesday, Paul Garcia of The Spot Up Shot reports.
Since going undrafted in 2024, McGlothan has been trying to land a spot on an NBA roster. He most recently appeared in five games for the Pacers during the 2026 Las Vegas Summer League, averaging 8.8 points, 4.0 rebounds and 1.6 steals over 17.8 minutes per contest.