What if Aramis Can’t Play?
Aramis Ramirez looks to be out another day today with his sore shoulder. We know that he’ll need surgery on the shoulder at the end of the season, and it’s a little bit of a concern that it seems to be getting more painful for him as the season goes on. With the Cubs two games in back of the Cardinals, they need every at-bat they can get from Ramirez, who’s been the team’s best player this season - Fangraphs puts him at about a win and a half better than replacement over the just 182 plate appearances he’s had so far this year.
But what if Ramirez needs to miss extended time, or is done for the season? At this point the most likely answer is that Jake Fox would take over at third base. Nobody questions that Fox is a decent hitter. He’s hit very solidly in the majors, and in AAA this season he absolutely destroyed the ball. He’s probably not as good as he’s been so far this year, but his ZiPs projection from Fangraphs is for a .329 weighted on-base average the rest of the season. That’s very close to average in the majors.
Fox’s defense, though, is a problem. Fox is roughly as much of a third baseman as I am, according to the scouts, and I haven’t played baseball since high school. He’s actually put up 135 innings at third this season, though, and been slightly above average in those innings, .5 runs above average (or over the course of a whole season, about four runs above average). But we can’t really expect that to continue - it’s more likely the scouts were right and Fox isn’t very good at third, a position he had to learn when he couldn’t stick at catcher and at which he’s still a work in progress, to be generous.
I don’t really know how bad Fox’s defense would be if he played third every day, but let’s just assume the worst for now. Among qualified players at 3rd base, Chipper Jones has the worst UZR/150 this season, at -20.7. Basically, for every 7.5 games Jones plays at third, he costs his team a run with his fielding. That’s about two wins a season. Let’s assume, for the sake of argument, that that’s how bad Fox’s fielding would be if he played every day.


