DM: Replacing Mark Reynolds and Wilson Betemit (designated hitters) with Manny Machado (a shortstop) is a huge upgrade. Plus the outfield only has one error so far after 22 last year, and the second basemen thus far have zero (Robert Andino had 13 last season). Errors are not a great way to judge defense, though. It's way, way too early to take advanced defensive stats seriously, but even by the simplest measure of converting balls in play into outs the O's are third-best in the majors so far. I'm going to guess they'll end up around average -- the outfield defense is actually not good (Markakis has very clearly lost multiple steps and his arm might now be below average, and Jones doesn't always get good jumps or take good routes to balls), but the infield picks them up (especially Matt Wieters, Machado and J.J. Hardy).