Watching a baseball game will be safer in all major league ballparks during the 2018 season.

The Seattle Mariners, Arizona Diamondbacks and Tampa Bay Rays announced on Wednesday that they would extend the protective netting behind the dugouts in their ballparks in time for opening day, meaning all 30 teams have decided to exceed the recommendations for enhanced safety issued by commissioner Rob Manfred in December 2015.

The announcement came a day before Manfred was expected to issue a mandate at baseball’s quarterly owners meetings in Los Angeles that all teams must extend their netting to at least the far end of the dugouts by the beginning of the coming season.

The Mariners said the new netting at Safeco Field will extend to the outside edge of both dugouts and be 11 feet high. Seattle worked with Major League Baseball and design firm HOK to come up with the engineering and design for the new netting.

Mariners president Kevin Mather says the new design improves safety “and uses the latest materials and industry standards to minimize the impact on sightlines.”

—From wire reports