Lets do a little breakdown:
-Rams the Lakers up the ass with Phoenix, eliminates LA from two consecutive post-seasons.
-Costs LA two 1st-rounders in trade for him.
-Breaks leg during second game as a Laker, never healthy again, career as effective player essentially ends 5 quarters into LAL career.
-Lakers hire Mike D'Antoni instead of Phil Jackson due in large part to Nash's presence.
-Refuses to take advantage of medical retirement despite futility of comeback, costing Lakers $9.3m in cap room.
-Nerve damages ends 2014-15 season before it begins, with Lakers down a roster spot and already thin at PG position.