I guess it depends on what your definition of minimal is but Khris has registered 3748 innings in LF so far with a -22 Arm per DRS & a -21 Arm per UZR. Yoenis Cespedes has registered 3888 innings in LF over that same time frame with a +27 Arm per DRS & a +22 Arm per UZR. That is about a 5 win swing or about a win per season that can be gained or lost by a LFers arm. To be fair, yoou're talking about one win per season between probably the absolute best arm in baseball in LF vs. the absolute worst arm. Most guys are going to fall somewhere in the middle, and the difference between probably 80% of the guys in MLB is going to be somewhat negligible I'd say. To put 1 win into perspective it is the difference between a Domingo Santana and Orlando Arcia this year, it is pretty huge. It is the close to the difference between Aguilar and Villar. It is a very large difference.