Fewest errors in the majors (8)... Your Toronto Blue Jays! Last year they finished with the 5th most (111). Take it how you want but after the circus last year, this can't be a bad thing. For those watching most or all of the games, it's easy to tell that the defense has improved.
Diaz and Goins have been a revelation, defensively (playing both SS and 2B). I can't recall either of them making a single mistake all year or not coming up with a ball that they should of. Really, really impressed.
In terms of catching duties, Navarro has been a significant upgrade over JPA. There was the one game where he allowed 3 wild pitches and 3 runners to score in one inning but I can't blame him for it (Santos slider is vicious especially when it's 3 feet in-front of the plate).
Melky is running better and that's led to a few extra plays being made that he wouldn't of made last year, granted he's still not an above average LF.
Lawrie looks even better than he was after returning from injury last year, he's not rushing and he's making all of the plays he needs to make plus a few gems.
Rasmus has looked good in the OF but has missed some deep fly balls mainly due to poor positioning.