Derek Harper is probably more deserving than Jason Kidd in having his number retired by the Mavs, I mean Harper is the Mavs all time leader in assists and steals, and is 4th all time in points, 3rd all time in win shares (2nd in defensive win shares), 3rd all time in games played, all of which are ahead of Kidd. Michael Finley is also more deserving than Kidd. But as I said earlier, Dirk is really the only guy that should have his number up there, but I wouldn't really question Finley or Harper.