 In the 1967 – 68 NBA season , matters began to turn sour between Chamberlain and the Sixers ' sole surviving owner , Irv Kosloff . This conflict had been going along for a while : in 1965 , Chamberlain asserted that he and the late Richman had worked out a deal which would give the center 25 % of the franchise once he ended his career . Although there is no written proof for or against , ex @-@ Sixers coach Dolph Schayes and Sixers lawyer Alan Levitt assumed Chamberlain was right ; in any case , Kosloff declined the request , leaving Chamberlain livid and willing to jump to the rival ABA once his contract ended in 1967 . Kosloff and Chamberlain worked out a truce , and later signed a one @-@ year , $ 250 @,@ 000 contract . 
