No one knew.

Russell Westbrook had a chance to put the Oklahoma City Thunder ahead in the final moments of Game 6 of their Western Conference first-round series against Portland. He tried a layup with 18 seconds left. It missed.

No one knew that was the 17,350th and final shot he would take as a Thunder player, the last time he would touch the ball in an Oklahoma City uniform, the end of an storied 11-year run that — when factoring in both regular-season and postseason games — saw him score more points than anyone else in franchise history.

A new day has arrived in Oklahoma City. The Thunder —...