It's also pick-proof: Wannabe spies in the other dugout can't steal these signs.

WSJ: College World Series: College Baseball Showing Signs of a Revolution With Catcher Wristbands

At one point, the bullpen phone in the Marlins' dugout wasn't working.

WSJ: Pierre, Marlins run out of chances, lose to Mets

The energy in the dugout was very sad and we weren't really in the mood.

NPR: Jennings, Rays Shaken By Happ Getting Hit In Head

And Pena certainly didn't mind Rodney's spontaneous dugout contribution.

NPR: Dominicans Beat Netherlands 4-1, Reach WBC Final

He wasn't ready to bat and plate umpire Dan Iassogna went over to the dugout to get him.

WSJ: Santiago sharp, White Sox lose to Mets 1-0 in 10th