With the No. 6 pick in next month's NBA draft, the Boston Celtics are not going to get a rim-protecting big man.

With so few available by way of free agency, swinging a trade for one seems to be the most likely route for Boston.

But if there are so few and they are so in demand, why would anyone trade 'em?

Usually it's due to a lack of production on the court, too much time in the court of law or someone who has run afoul of the NBA's rules.

Which brings us to Milwaukee center Larry Sanders, a rim-protecting big man who is expected to generate some trade interest this summer from a number of teams.

Just two years ago, Sanders was one of the most improved players in the NBA. He was a near double-double (9.8 points, 9.5 rebounds in 2012-2013) without having a lot of plays called for him.

But just as important, he swatted away 2.8 shots per game, the kind of production that's rewarded sooner rather than later.

Milwaukee jumped at the chance to lock him up long-term as both sides quickly came to an agreement on a four-year, $44 million deal that kicks in this fall.