Major League Baseball has informed all 30 teams that by 2015 all ballparks must have either handheld or walk-through metal detectors in place. “This procedure, which results from MLB’s continuing work with the Department of Homeland Security to standardize security practices across the game, will be in addition to bag checks,” said MLB spokesman Michael Teevan. As the AP notes, the Mariners will have such measures operational in time for the upcoming season. This is obviously being put into place for the safety and best interests of the fans and teams involved. However, there may be the issue of finding a balance between safety and customer convenience, and it will likely take some time to find it.