For the second time in four days, LeBron James went head-to-head with a fellow MVP candidate leading a Western Conference contender. But while he dominated Thursday's matchup with Stephen Curry and the Golden State Warriors, on Sunday, Houston Rockets star James Harden matched him step-for-step in a rough-and-tumble contest that featured 13 ties and 11 lead changes, and came down to the final seconds of overtime. And on this particular occasion, the most gifted player in the game found himself bedeviled at the worst time by an uncontested 15-footer. [ Follow Dunks Don't Lie on Tumblr: The best slams from all of basketball ] With the Rockets leading his Cleveland Cavaliers 104-103 late in the overtime session of a nationally televised Sunday showcase contest, James beat excellent Rockets defender Trevor Ariza off the dribble to gain the lane, where he was fouled while attempting a layup by Houston forward Josh Smith. The whistle sent James to the foul line for a pair of free throws that could have tied the game and given the Cavs a one-point advantage with just 4.2 seconds left. But James, who had struggled from the line all day, found no charity at the stripe, missing them both...