Markakis has a decent arm, but this is his UZR from fangraphs:
09- -6.0
10- -5.5
11- -.6
12- -8.6
13- -6.6
14- 6.2
Total runs above (or below) average according to BR:
09- -3
10- -3
11- -4
12- -3
13- +1
14- +4
Here is a fangraphs piece on him:
Yesterday, the Atlanta Braves signed Nick Marakis to a four year, $45 million contract. As Mike Petriello noted, the deal just doesn’t make much sense from a numerical perspective, since nearly every piece of evidence we have is that Markakis just isn’t that valuable of a player.
And if you have never heard of UZR or DRS, you very well might think that Markakis is just as good of a defender as Heyward. He’s won two Gold Glove awards, including one last year. He has a career .994 fielding percentage, seventh highest among active players, and his 93 outfield assists rank behind only Ichiro and Torii Hunter among current outfielders. Markakis excels at the kinds of things that people have historically valued in defenders, so if you just evaluate him on these metrics or by an eye-test that relies heavily on those factors, then Markakis looks like a pretty good defender.
So, then, this signing basically comes down to how much weight you put on modern defensive statistics. This signing essentially suggests that the Braves are putting no weight on them whatsoever, rejecting their conclusions entirely. The Braves are simultaneously acknowledging the value of defense — if they didn’t think glove work mattered, they wouldn’t be paying significant money to a right fielder who hits like a middle infielder — while rejecting statistical attempts to quantify that value. And plenty of observers are going to agree with that assessment, considering that defensive metrics certainly are not perfect.