Castro agreed to a two-way contract with the Bucks on Wednesday, Brett Siegel of ClutchPoints.com reports.
Castro will join the Bucks on a two-way pact, meaning he will likely spend most of his time with their G League affiliate, the Wisconsin Herd. Over 29 starts for George Washington in 2025-26, the 23-year-old big man averaged 15.3 points, 9.1 rebounds, 1.8 steals, 1.7 blocks and 1.7 assists across 27.3 minutes per game.