Top Rockies prospect David Dahl robbed a HR with a catch that left him nearly on top of the wall

Top prospects typically spend their first few years of professional baseball in the Minors, living up to and expanding their scouting reports on the way to the big leagues. Sometimes, like Rockies No. 2 prospect David Dahl demonstrated on Friday, they pull off feats that make their scouting reports seem as self-evident as the Declaration of Independence. 
According to MLB Pipeline, Dahl's "quickness and instincts give him fine range in center field," and "if he can stay healthy, he could do a lot of damage and run down a lot of fly balls at Coors Field."
Yes, we'll say so:

Playing left field with the Double-A Hartford Yard Goats, Dahl tracked down a deep fly ball and, with a catch that nearly left him sitting on top of the wall, robbed what would've otherwise been a leadoff home run for the Altoona Curve.

Considering the Yard Goats won, 3-2, Dahl's catch could've very well been the difference maker. "He could do a lot of damage and run down a lot of fly balls," indeed.