My understanding is "Pies" is a play on Piebald (Seibold) and happened to also coincide with a club publicity shot of him looking decidedly chumply at training while Boyd was spruiking a vego diet. A week later the club went into fatshaming damage control and released a story about the coach starting Pilates.
So granted, giving a nickname that might hint at someone's physique like Porky Morgan, Fatty Vautin, Tubby Taylor, Blocker Roach or Big Artie mightn't be funny, but I'd argue that it's slightly less "dumb" than defaulting to Seibs, Benno, Kevvie etc. At least it's not Smell Myfinger.
I'd also like to point out calling Renouf "Pearl" is racist, short for "Black Pearl," and wasn't even original, following on from Ellery Hanley.
At any rate, you broke a site ban by saying it. So who's the real naughty boy?