Dallas Mavericks forward Cooper Flagg will look to surpass the impressive numbers he put up in his rookie year. Dallas Mavericks forward Cooper Flagg will enter his sophomore season with an entirely different mindset. Fans were hyped to see the Rookie of the Year loading up for his sophomore year. During his rookie campaign, Flagg often said he needed to be better at dealing with the league's physicality. The Mavericks will heavily rely on the duo of Flagg and Irving, who will play together for the first time.