By Evan Bleier Of the nine Celtics players who took the floor in Brooklyn for Boston’s series-clinching Game 4 win over the Nets, seven were drafted by or began their career with the C’s. (Undrafted center Daniel Theis signed with the team after playing in Germany for multiple years.) For the Nets, who fell 116-112 to complete Boston’s four-game sweep, only one of the nine players who took the floor, Nic Claxton, was drafted by Brooklyn. Built via free agency and by swapping solid role players like Jarrett Allen, Spencer Dinwiddie and Caris LeVert for high-end talent, Brooklyn embraced the NBA…