Flash forward four years, and since starting summer league training camp on his 20th birthday last week, the former top-five high school prospect whom Dallas acquired in a second-round draft-night trade has displayed the same characteristics as the Mavericks’ coaching staff learns and evaluates how the next stage of his oft-hyped career will progress. “I for sure had a chip on my shoulder,” Jaden Hardy said. “I really want to prove myself right. I didn’t really care about other people. I want to prove myself right.”