For as long as the NBA has existed, "size" has been in demand.
If you're six feet tall and aren't great at basketball, then it's best to plan for a more standard career.
If you're seven feet tall and not that good at basketball you could get drafted, you might even stick on some rosters for a while.
This coming summer, the NBA will have a selection of free agents who aren't just seven feet tall, but are also very good at basketball.
While the league's very best big men, like Andrew Bynum, Dwight Howard and Kevin Love, won't be available to the highest bidder, quite a few of the league's most talented players who happen to be either centers or power forwards are free agents.
With so many big men available, who is the best? This slideshow will rank the 10 best power forwards and centers available this summer based on the projected performance of the player next season. Tim Duncan has had by far the best career of any free-agent big man, but at his age he's no longer the most dominant one available.
Who is number one, and where does Tim Duncan stand now?