Safeco Field
The Mariners moved the fences at Safeco Field closer to home plate before the 2013 season "to create an environment that is fair for both hitters and pitchers," according to General Manager Jack Zduriencik. Safeco Field had been considered one of the most pitcher-friendly ballparks in the majors since it opened. The center field scoreboard and ad panels were replaced with an board during renovations, becoming the largest among all stadium scoreboards in the major leagues at the time.