Stephon Castle Dunks on Isaiah Hartenstein in Spurs-Thunder Game 2

Stephon Castle drove from above the break, planted at the restricted area, and went straight through Isaiah Hartenstein for what is now the dunk of the 2026 playoffs. Second quarter of Game 2, on the road, in front of an OKC crowd that went silent inside the same play. The Paycom Center had been loud all night up until the bounce. After it: nothing.

What actually happened

Castle caught the ball just outside the three-point line on the left wing. One dribble to the elbow. Second dribble to the paint. Hartenstein — a legitimate seven-footer who has spent this postseason being one of the most effective interior defenders in the league — rotated over from the strong-side block and met him at the rim. Castle didn't go around him. Castle went over him. The cock-back, the hang time, the finish — all of it happened with Hartenstein fully extended in vertical position. Dunk Score logged it at 116.9. That is a real number on a real scale and it is one of the highest single-play marks of the season.

Why this is the year-end clip

Dunks of this magnitude only happen with two things present at once: an athlete with vertical leverage no defender expects, and a stage big enough that the dunk earns context. Castle had both. He is in his second NBA season, was the 2024-25 Rookie of the Year, and is now playing in the Western Conference Finals as the No. 2 perimeter creator next to Victor Wembanyama. The Spurs are in the same week that produced the Knicks' 22-point comeback in the East — both conference finals are turning into a referendum on which young guards can take a series over.

Hartenstein is also not a soft contest. He is one of the few centers in the league whose vertical contest reliably alters shots at the rim. Castle going over him is not Castle dunking on a closeout — it is Castle dunking on the player whose entire job is to make sure that does not happen. That is the qualifier that separates a highlight from a poster.

The Castle arc

Castle won Rookie of the Year a year ago next to a rebuilding Spurs roster. The leap this season — to a starting-five player on a Western Conference Finals team — is exactly the kind of second-year jump that, in retrospect, marks the difference between "solid pick" and "franchise piece." San Antonio's front office now has Wembanyama as the centerpiece, Dylan Harper from the 2026 All-Rookie First Team, and Castle running point. That is a three-way young core that doesn't need to be built around anyone over 25.

The Spurs lost the Hartenstein matchup overall in the regular season. They are winning it in May. Castle's dunk doesn't decide the series. It does signal that the floor on his upside just moved up another tier.

Source: Yahoo Sports, Bleacher Report.