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The Heat's need for production from their starting point guard is no secret.
While Chalmers is far from being their primary ball-handler or distributor, he plays a key role as an alternative source of offense, and in keeping opposing points honest—at least in those matchups where the onus doesn't fall on LeBron or D-Wade.
Chalmers' true value to this team (in the playoffs, at least) could lie in his propensity to overachieve in big-game situations—let's call him the Anti-Bron.
During the 2011 finals, Chalmers was the Heat's second-most consistent performer behind D-Wade (in his own statistically modest way), which ostensibly had something to do with his NCAA Championship experience with Kansas in 2008.
Even in his lesser capacity within the team rotation, Chalmers seems to have more of a penchant for stepping into the spotlight, and shows no signs of the big-game trepidation that has already cost this team a title.
He could prove especially key in a series with the Bulls (sans D-Rose) with no upper-tier point guard against which to match up.
If Chalmers can maintain his trend of playing up to the mounting pressure of going deep in the playoffs, he could prove to be a difference-maker in both the Conference and NBA finals (which the Heat cannot for one second imagine not being a part of).