Photo: Mark Seliger Fatigue had caught up to Jalen Brunson . For two grueling months of playoff basketball, he had seemed immune to it, growing stronger in the game’s last minutes just as his opponents would begin to fade. The pattern repeated itself throughout the NBA Finals, when the youthful San Antonio Spurs and their sinewy phenom Victor Wembanyama wilted in the fourth quarter, bricking free throws and committing mystifying turnovers. Brunson and his teammates, however, consistently