San Antonio Spurs head coach Mitch Johnson raised eyebrows across the NBA during preseason game four against the Phoenix Suns, unveiling a radical, four-guard starting unit of De’Aaron Fox, Stephon Castle, Dylan Harper, Devin Vassell, and Victor Wembanyama.
While the bold tactic promised lightning-fast transition play and relentless perimeter defense, its first live test exposed a glaring, dangerous flaw: severe floor-spacing congestion that nearly paralyzed San Antonio’s half-court offense.
With Phoenix’s defense refusing to respect the perimeter threat, the Suns collapsed into the paint, forcing San Antonio into a abysmal 1-for-10 shooting start from the field.
Floor-Spacing Nightmares in the Half-Court
The core issue stems from putting four perimeter players on the floor who do not command gravity as elite off-ball floor spacers. While Devin Vassell plays wing, his perimeter profile classifies him alongside three natural lead guards in Fox, Castle, and rookie phenom Dylan Harper.
Opposing defenses capitalized on this lack of shooting threat immediately:
- Stephon Castle struggled early, going 0-for-2 from three-point territory as Phoenix sagged off to clog driving lanes.
- De’Aaron Fox (2/2 3PM) and Dylan Harper (1/2 3PM) hit timely shots, but Phoenix’s scheme continued to wall off the paint.
- Victor Wembanyama found himself trapped in a crowded, sardine-packed interior with zero room to operate in the post.
Although the unit pulled together late in the second quarter to stage a scoring run against Phoenix’s reserve unit, relying on low-percentage perimeter shooting from non-shooters creates a volatile foundation for a team targeting the Western Conference’s top seed.
Harrison Barnes Insertion Sparks 20-Point Explosive Surge
The true contrast occurred in the second half when Fox rested and veteran forward Harrison Barnes stepped into the frontcourt alongside Vassell, Harper, Castle, and Wembanyama.
Re-establishing a classic alignment featuring two primary ball-handlers and two elite spacers around Wembanyama, the Spurs instantly unlocked their high-octane offense, exploding on a run that stretched their lead to nearly 20 points.
The stark difference in offensive execution reignited debate across Spurs Nation, where fans still remember the failed Jeremy Sochan point guard experiment and demand a proven, championship-level rotation.
Race Against Time Before Opening Night
Addressing the lineup experiment after the game, Johnson preached patience, acknowledging that injuries and a stop-and-go preseason have restricted full-squad chemistry:
“First time that group’s played together. It’s been a very stop-and-go preseason in terms of lineups, so we’re just trying to get into a little bit of a rhythm. Some positive reinforcement to show them and some learning…”
However, in a loaded Western Conference where early-season losses can cost home-court advantage in the playoffs, Johnson cannot afford to waste regular-season games tinkering with unproven lineups.
Unless Castle and Harper rapidly develop high-volume perimeter shooting, Johnson may be forced to abandon the four-guard experiment in favor of traditional frontcourt balance before opening night.
