He was the 25th draft pick in his class (2009), and was actually drafted by the Angels behind Randal Grichuk (the team had two back to back "compensation" picks). He was a first round pick but just barely, because he was actually the Angels' "second" choice. Normally, a very talented player would be drafted in the "top five," because scouts, coaches and commentators would be all over him. A 20-something draft pick is normally a talented player, but one that teams have doubts about, someone like St. Louis' Kolten Wong.
A talented second baseman named Dustin Pedroia was picked by the Boston Red Sox late in the second round. Teams overlooked him because he was "small" (5'7") for a baseball player. But Trout (over six feet tall, over 200 pounds) had no such disadvantage.
How was Trout perceived prior to the draft? Was he considered "standard strong" but lacking a "hook," that would have put him in the top five or ten at the time he was picked?" Did he have "hidden" talents/skills that became apparent only after he was drafted? Were there concerns about him that proved to be "irrelevant" when he actually started playing? (These are reasons that high potential players go in the 20s (or higher numbers) overall rather than in the top five or ten.)