Jeff Sullivan pointed this out on Twitter after FSN showed a tight shot of Milton Bradley at the plate in the bottom of the eighth inning. It appeared Bradley had earplugs in and on second look, those suspicions were confirmed. For whatever reason, Milton Bradley is playing with earplugs to block out all the crowd noise, something I haven't seen before.
Here's the photo, taken by Bubba Prog.
Hopefully Bradley isn't being booed by the home crowd, but if it keeps him from going at it with out-of-town fans or at other stadiums, then maybe the earplugs are worth it.