Yes, I know that. It means one of two things. Either it's a statistical anomaly (certainly mathematically possible, but I sure as hell wouldn't bet on it given the larger sample size), or there's another factor that wRC+ isn't capturing. It's a very VERY large difference. Maybe he simply sees the ball better in Coors, who the hell knows. If I'm looking at trading for him, I'm paying a lot more attention to the road number though. If it was just a season's worth of at-bats or something, it would be a different story.
For whatever it's worth, league average is generally between 5% and 10% higher wRC+ for players at home over the road.