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On Sochan:
Yes, the PG experiment on Sochan failed and now Branham is carrying on the torch. But in this "experiment" season, Pop is just trying to audition the guys to see who would fit with Wemby when he is "ready" to takeover. Putting Sochan as the PG is a gamble and also to see what Sochan is really made of.
Can Sochan figures it out? Is there PG potential in him? Pop is simply throwing him into the fire like he did with Tony. Sink or Swim? Tony figures things out and swimmed. The NBA is a tough and cut throat league. If you are not good enough then you will be replaced and exposed eventually.
Sochan need a mid-range jumper and respectable 3% to survive in the league tbh. He is not best perimeter defender or a top rebounder. Now his playmaking skill has regressed from his rookie season and thus far he has revealed that he has tunnel vision and also the worst chemistry with Wemby.
This is only his 2nd year so Sochan still can improve. But he has to put in the hard work. Take comparison with Nephew who was not scouted for his offensive skills during his college days. But now Nephew has become one of the best unstoppable 1 on 1 player with a Jordanesque pull up jumper. It is up to Sochan to sink or swim. Or he may not get the rookie extension and he will not be with Spurs after his rookie contract ends.