Typically, Player manager or general manager discusses numbers available due to recently retired, transferred or ousted players. The discussion is just that, the player is given some input, but, unless a star, not final say. In the 'olden days' lots had to do with who the had the number last. For example, 88 Milford, no one wanted Gogor's number given the poor association with his performance. I would say too that it is tough to follow a big personality - who would want 30 just after Juaristi retired? Not me. Bob Huessler of PR would often weigh in at Milford. Bpt was mostly the PM