The "Rookie Bullpen Guy" for most teams gets to sport a Hello Kitty or Dora or Hannah Montana backpack as they head out to the bullpen before the first pitch. Always pretty funny to see.
Jason Heyward has a pretty weird swing, actually. Whatever works.
Troy Tulowitzki made an aweful baserunning error, and it probably didn't help when Jason Heyward ran by him and offered a little pat on the back.