7. Jae Crowder
One player who transitioned into a 3-And-D player, but their time was limited with the Dallas Mavericks was Jae Crowder. The 6-foot-6 forward started his NBA career with the Mavs before being traded for Rajon Rondo.
In two seasons with Dallas, Crowder became a primary role player who could do the little things. During his rookie year, he started in 16 games as he filled the void for Dirk Nowitzki and Shawn Marion, who were both injured at the time.
His stellar Summer League debut helped him earn a starting role. Crowder averaged 5 points per game and 2.4 rebounds in 17 minutes in his first year.
The former Mav hit a rookie wall his sophomore year. In his second season with Dallas, he shot 43.9 percent and averaged a mere 4.6 points per game. His production dropped more when the team added Richard Jefferson and Al-Farouq Aminu. During his final season, Crowder averaged less than 10 minutes per game.
His production increased after his departure. In his first season with the Boston Celtics, Crowder averaged 9.5 points per game in under 24 minutes. He has a career average of 9.5 points per game and a shooting percentage above 41 percent.
If only Crowder stayed with Dallas long term, its possible he could have solved the team's wing dilemma. He was the perfect fit in Dallas, and Mavs fans always seem to want him back.