Castle (wrist) was a participant in Tuesday's practice, Tom Orsborn of the San Antonio Express-News reports.
EDGE Analysis
Castle sprained his wrist during Summer League but has fully recovered from the injury and is practicing with the team. The rookie figures to play a significant role early on considering starting SG Devin Vassell (foot) is expected to be sidelined into November. Castle will compete with Malaki Branham and Blake Wesley for a starting role while Vassell is inactive.