MEXICO CITY -- When Dustin Johnson dominates as he did again in winning the WGC-Mexico Championship for the second time, it often makes you wonder why he doesn't bring home more of the tournament hardware.
The game can appear to look so easy for him, and playing in the thin air of Mexico City and bombing drives into the sky almost seems unfair. The raw power, the athleticism, the much-improved wedge game ... all of it has put Johnson, 34, near the top of the world rankings for the better part of two years and within percentage points of being No.