The biggest snubs from our list of the NBA's best role players this season

It was very difficult to pick just 12 Film Room All Stars, even with the restriction of one player per team. Here are the role players that were most difficult to leave off the final roster.

TAJ GIBSON

The Bulls' baffling inconsistency can be traced to their disappointing frontcourt. Joakim Noah's game fell apart before his injury, Nikola Mirotic regressed in every area after a promising rookie season and Pau Gasol continues to generate empty numbers. Then, there's Taj Gibson. The Bulls have always searched for someone better, only to keep coming back to the one big man who contributes reliably.

As the rest of the Bulls fall apart like a house of cards, Gibson's blue-collar game stands out. His defense covers for Gasol:

His offensive rebounding keeps countless possessions alive:

Plus, he's the only healthy Bulls big man that sets good screens.

His production fell just enough to leave him off the Film Room All-Star roster, but he was a difficult last cut. Consider him the injury replacement for Duncan.

OTHER SPURS AND WARRIORS

If the hypothetical one-per-team limit was lifted, several players on the NBA's two best teams would merit serious consideration. Boris Diaw's post scoring, defensive versatility and passing skill would normally make the team, but Duncan has done more in more minutes this year. Manu Ginobili and Patty Mills would also have been prime candidates for guard spots. Ginobili's speed and playmaking was remarkable for a guard his age until his injury, while Mills' full-court defense and microwave shot-making overwhelms other second units. The Spurs spring to life when both enter the game.

Shaun Livingston, Andrew Bogut and Festus Ezeli were prime Warriors candidates, but I ultimately chose Iguodala over Livingston by a nose to be the Warriors' representative. That was not an easy choice. You could argue Livingston's post scoring is more important to the Warriors' bench than Iguodala's passing, and both are excellent defenders.

Draymond Green, amazingly, is ineligible for the team based on his 19 usage rate. He would be an obvious shoo-in since he practically defines the "Film Room All-Star" ideal, but he was deservingly on the actual All-Star roster.

JUSTISE WINSLOW AND KENTAVIOUS CALDWELL-POPE

I really wanted to include two of the league's budding shutdown wings, but neither shoots well enough. Caldwell-Pope is streaky enough to at least be a threat, but there are still too many games where teams ignore him to help on Reggie Jackson/Andre Drummond pick-and-rolls.

Winslow is a monster already defensively, with tricks that some of the league's best wing stoppers even lack. He's quick enough to slide his feet laterally, yet strong enough to dig into their airspace and pressure them. Early comparisons to a saner Metta World Peace are frighteningly accurate.

Alas, Winslow is shooting 26 percent from three-point range and is treated as a complete liability when he doesn't have the ball. Eventually, that'll improve. Until then, he's too one-dimensional to make the final Film Room All-Star team.

MARVIN WILLIAMS

ESPN's Zach Lowe covered Williams' revival recently, so there's no need to say much more. Charlotte's transformation into a speedy, long-range rocket launcher would have been significantly rockier without Williams' switchability on defense and growing proficiency at taking advantage of switches on offense. He's turned into a quality player that could really help a contender in free agency this summer.