The Dallas Mavericks have a new lead executive, as they introduced former Toronto Raptors president Masai Ujiri as the Team President and Alternate Governor, a big title with a lot of responsibility. Team governor Patrick Dumont wanted someone who commands respect but can still build a strong culture and be a clear communicator, and he's got that in Ujiri. If Dallas wants to get back to being a contending team, there are many areas they have to get better at. Ujiri addressed one of those, saying they have to be better medically. "One of the things we have to get better here is how we figure out medically what we do," Ujiri started. "...Things you do off the court, too, to help young players mentally. We don't pay enough attention to this in the NBA, and really focus on their focus. Help them through this, a lot of times, this youth are coming from different environments. They're still learning, they're still young." Injuries have hampered the Mavericks for the last few years.…