Stephon Castle is always up for the challenge, and the Spurs look ready to join him

SAN ANTONIO — The most telling part of Stephon Castle’s thunderous dunk over Isaiah Hartenstein in Wednesday’s Game 2 of the Western Conference finals happened before he bounced off the invisible trampoline. Before he suspended in the air like a rhetorical question. Before he cocked it back and flushed it with disrespect. It came after he took the pass from Victor Wembanyama and used a jab step to lose Oklahoma City Thunder guard Cason Wallace. After he saw the lane wide open and a 7-footer sliding in front of the rim. That’s when Castle revealed his mindset. He chose...