Of 30 MLB teams, only four have yet to expand protective netting down foul lines
IronPigs Extending Coca-Cola Park Protective Netting
Oakland A's to expand protective netting at Oakland Coliseum
Yankees to expand protective netting at Yankee Stadium in 2018 - Sports Illustrated
New-look ballpark: Marlins showcase stadium renovations ahead of Opening Day - Ballparks of Baseball - Your Guide to Major League Baseball Stadiums
All 30 MLB teams to have safety nets for 2020 after fan injuries
Netting in Major League Parks: To Extend or Not to Extend - The Baseball Journal
Baseball still dragging its feet on protective netting
Braves' Snitker wants expanded netting to protect fans
We Needed to Do Something': White Sox Unveil Extended Protective Netting - The New York Times
After overseas delays, West Palm's ballpark extension nets are finally here
New netting at Marlins Park to give fans more protection
Miami Marlins extending netting at Marlins Park Florida & Sun News - Bally Sports
Marlins complete MLB jersey patch deal with ADT