Cameras caught referees checking random Ravens and their uniforms as they left the locker room. For anyone wondering what that was about, it's standard practice by the NFL. Officials check both teams, but the Ravens were the ones who made it on TV.
Silicone on the jersey makes it slippery and officials randomly check players before each half— Jim Daopoulos (@RefereeJimD) September 6, 2013
They check random players on both teams before the game and at halftime.— Mike Pereira (@MikePereira) September 6, 2013
Players used to do it to make themselves harder to grab and/or to make it easier to catch the football with stickum— Mike Pereira (@MikePereira) September 6, 2013
And now you know.