Jared McCain's inconsistent Summer League provides blueprint for NBA success

LAS VEGAS -- Miles away from the bright lights and the glamour of the Las Vegas strip, long after most of his teammates had left the facility, Jared McCain is on the court with Rico Hines and a host of Sixers' coaches, running through yet another shooting drill for the 20-year-old guard.
The drill starts off rough for McCain, who misses the first six shots of the set. It doesn't get better from there, as the next shot, his seventh consecutive miss, doesn't even touch the rim. McCain, given the option of doing sprints or pushups as punishment anytime he throws up an airball, chooses the latter.
"I was too tired to run," McCain would later tell me when asked about his choices.
When McCain gets...