Quinn Cook has proved plenty in the D-League as a member of the Canton Charge.
He was named D-League Rookie of the Year last season and All-Star Game MVP in this one. But until Sunday, couldn't had never received a real shot at the NBA.
That changed when the Dallas Mavericks signed him to a 10-day contract.
The Charge point guard went undrafted after winning a national championship at Duke in 2015. He has spent training camps with both the Cavaliers and Pelicans -- and worked out for the Pelicans again last week.
His chance finally came when the Mavericks parted ways with veteran Deron Williams -- opening the door for Cook.
As for the D-League, there is little more Cook can do. He's averaging 26.1 points and 6.7 assists with the Charge, and has been a huge constant on a team (and in a league) that undergoes continuous roster overhaul.
Cook will wear No. 2 for the Mavericks.