Bryce Harper hit a 2-run bomb into the visitor's bullpen at Citi Field in the first inning Monday night off the Mets' Chris Young. Destroyed the baseball, in fact. First HR in NY as a big leaguer. 9th HR of the season. Until HitTracker gets updated, we're calling this one at 420 ft.
Here's the video:
(Screencaps via MASN/TV)