The Red Sox were 29th in team defense in terms of DER
DER=
Defense Efficiency Ratio. The percent of times a batted ball is turned into an out by the teams’ fielders, not including home runs. The exact formula we use is (BFP-H-K-BB-HBP-Errors)/(BFP-HR-K-BB-HBP). This is similar to BABIP, but from the defensive team's perspective. Please note that errors include only errors on batted balls
so there you go , the Red Sox as a team sucked at defense last year
DER is a much better tool than UZR to determine team defense
UZR is more usefull for a position player and NOT a team