Devin Booker is entering extension negotiations with the Phoenix Suns as a relatively unhappy camper. According to Yahoo Sports’ Shams Charania, the team’s franchise cornerstone is none too thrilled that they waived his best friend, Tyler Ulis: [tweet https://twitter.com/ShamsCharania/status/1013469290845089794] Could this prevent Booker from signing the max extension the Suns are invariably going to offer [...]