He tends to make mistakes in bunches, which is indicative of inexperience. I have no idea why last night was a nervous night for him, but when he makes one mistake it seems to mess him up for the rest of the game.
His throws were definitely weak, but one was rushed after a diving stop and he didn't have time to get a grip on the ball. IIRC, he followed it with another diving stop. He's getting to balls that most SS's wouldn't, so maybe that puts him out of position to make good throws? I don't think Ian Desmond would have made half the grabs that Abrams has made so far.
