Currently, Miller Park is up to MLB standards for the netting, which extends to the inside edge of each dugout. By the start of the 2018 season, the netting will extend to the outer edge of each dugout.
Why are they adding netting to Miller Park?
The nets are a response to multiple instances across of fans hit by baseballs or bats at recent games. There hasn’t been any significant fan injuries in the recent memory of Miller Park, but it has definitely effected people across MLB.
One example was in Yankee Stadium, where the netting was at MLB standards, a ball off of the bat of Todd Frazier hit a young kid in the stands.