Isaiah says the 2011 Dallas Mavericks champion center took him under his wing in Houston, where Chandler instilled the importance of quarterbacking a defense from the center position. Hartenstein shared his past with reporters after training camp on Thursday. “I had to learn it. I feel like, especially coming in as a rookie, I probably wasn’t talking as much as I should. A big guy [who helped me] with that was Tyson Chandler,” Hartenstein said. “I played with him with the Rockets. He taught me how important communication is. Learning from those guys helped me a lot.”