NEW ORLEANS — When Jamahl Mosley and Joe Dumars sat down for their first interview, As the head of basketball operations for the New Orleans Pelicans, Dumars didn’t waste any time asking the question many people wondered during the final days of Mosley’s tenure as Orlando Magic coach.“I was like, ‘What the hell happened?’” Dumars said jokingly. “Right out of the gate.”While Orlando’s epic collapse in the Eastern Conference playoffs after grabbing a 3-1 lead over the top-seeded Detroit Pistons led to Mosley’s firing earlier this month, Dumars wanted to focus his attention on Game 6 of that first-round series. That game will probably go down as Mosley’s lowest Magic moment.In that loss, Orlando scored just 19 points in the second half and became the first team in the play-by-play era to blow a 24-point lead at home in a closeout game. Dumars and Mosley went into painstaking detail about everything in that second half, from Mosley’s timeouts to the adjustments he made as things unraveled and even his interactions in the huddle.As painful as it was to relive that night, Mosley said it was beneficial to talk through everything that went wrong — and what he learned from those mistakes.“It’s easy for everybody to say, ‘Hey, we missed a bunch of shots.’ That’s true, but there’s a process that leads to each of those shots,” Mosley said. “It was great to walk it backwards, because it then told you about the demeanor of our guys. What was happening in those moments when you’re down?”Mosley was introduced on Tuesday as the new head coach of the New Orleans Pelicans, and many of his ideals align with Dumars’ vision for the future of the franchise. They both have spoken about their desire to make defense the No. 1 priority for everyone — and they mean everyone — on the roster. They also have spoken forcefully about making accountability and physicality a non-negotiable as New Orleans forms a new identity.As much as both Mosley and the Pelicans want to look to the future, learning and growing from past mistakes will be the only way this marriage works.That loss in Game 6 was a great encapsulation of what went right and wrong during Mosley’s five years in Orlando. The defensive mindset his teams embraced often allowed them to overachieve, even when they dealt with bad injury luck. But Mosley’s detractors often complained about his team’s lack of offensive innovation or its ability to find solutions when things got stagnant.Installing his defensive ideals will be key to getting the Pels back to being competitive consistently in the treacherous Western Conference. But for them to reach greater heights, there has to be an evolution among the coaching staff and within the roster.Mosley steps into this situation already having a much deeper group of offensive threats than he ever had in Orlando. That will require some growth from him as an offensive tactician and a more flexible play caller to make sure all those weapons get involved.