There's a difference between grub and pest.
I would say Gallen's a grub. I would say Sandows a grub. I would say Hodges is a grub. They're the kind to smack on a cheap shot, elbow, rake at the bleeding wound of an opponent..
I would say Ennis is a pest. I would say Sailor is a pest (as well as a great entertainer). They're the kind of players to piss you off with their talk on the field, their celebrations, their attitude.. But they're not the kind of person to physically harm someone and do disgusting things like mentioned above.
They just get under peoples skin mentally. The others *cough*Gallen*cough* get under their skin physically...