He deserves to have his # retired in both cities, and he will.
He built and carried that Timberwolves franchise during the 90s and 00s and he has embodied everything Celtic since he arrived in 2007.
He also didn't leave Minnesota with any bad feelings. He initially refused to be traded. He would have finished his career in Minnesota. There is no bad blood there that I'm aware of.
He's already earned the right to have his # retired in the rafters at the Garden. He doesn't need another championship. He and Pierce will have their #s up there.
Ainge should get his up there as a player/GM, but that may take a few more years.