In his debut, Brett Phillips caught Denard Span off-guard with his arm
One of the advantages a player has in his Major League debut is that "the book" is not yet out on his strengths and weaknesses. Some of that advantage may have diminished a bit with developments in analytics, scouting, and the flow of information, but it still seems to be the case.
Take for example Brewers outfielder
Speaking to MLB.com's Adam McCalvy, Phillips attributed his laser throw to a rush of adrenaline fueled by a teammate. "Luckily, [left fielder]
As the book on Phillips goes through its publication, more players may react to his arm much in the way he reacts to opossums.