The Jump’s Rachel Nichols, Marc J. Spears and Matt Barnes react to the Dallas Mavericks parting ways with GM Donnie Nelson after 24 years and how it could impact Luka Doncic’s future with the franchise. #NBA #Doncic #Mavericks ☑️ Subscribe to ESPN+: https://plus.espn.com/ 📱Get the ESPN App: http://www.espn.com/espn/apps/espn 🏀 Subscribe to NBA on ESPN on YouTube: http://bit.ly/2yxs3Og ☑️Subscribe to ESPN on YouTube: http://es.pn/SUBSCRIBEtoYOUTUBE ☑️Watch ESPN on YouTube TV: http://es.pn/YouTubeTV