What was the best offseason pickup by a bj-league team?
You could make a strong case that Niigata Albirex BB center Chris Holm fits the above description.
Holm, a rebounding machine, gives the Albirex their best post presence inside since Nick Davis manned the middle during the 2005-06 and 2006-07 seasons, the first of which ended in a championship runnerup spot.