I dont get how that dont make sense,he dont have great foot speed in the OF but i rarely see him make mistakes,alot of assists,he doesnt make mistakes or miss many balls...I dont see where the negative figure comes from...youre now focused on something else.
http://www.fangraphs.com/statss.aspx?playerid=1887&position=3B/OF#fieldingadvanced
Balls In Zone....Total Plays made.....and then compared to other RF. That's how it's calculated.
And his arm is factored in as well.



