Stephon Castle’s major breakout for the Spurs last season was in large part fueled by his defense. The sophomore proved himself as a truly elite on-ball stopper, taking on the NBA’s top stars nightly and regularly giving them fits. This is a list of the league’s seven best defenders at the shooting guard position, with accolades, stats, and the good old eye test all used in consideration. Stephon CastleCastle is less established than most of his company on this list, but his presence is inarguable. Along with cracking the All-Defensive First Team in 2025-26, White ranked 13th in the entire league in total blocks, an unbelievable feat for a guard.