Red Barclay

Red Barclay was a guy who Homer met at The Slaughterhouse. Barclay had suffered a heart attack whilst in a competition with Homer to see who could eat a large steak fastest. He had notably driven a red custom truck which was passed on to Homer to complete his schedule.

History
He and Homer Simpson had a contest to see who could finish the largest steak on the menu, the "Sir Loins-a-Lot". In the end, Red wins and keeps his title of champion (he was the only person other than to succeed in eating the steak in one hour), but suddenly dies of beef poisoning.

Homer takes over his job, since he still has 1 more delivery to make (Artichokes and migrant workers). It's also implied that he tends to be placed in a bag at times, as when Homer described Red's fate to the guy he delivered the last delivery to, the man chuckled and said "Sounds like ol' Red, all right."

Non-canon
In The Simpsons Game, after winning the Duff Ultimate Eating Challenge, Homer is presented with a championship belt named after Barclay.