Pecos is Jerry's bluegrass-singing uncle who appears once, in the short Pecos Pest. Uncle Pecos lives with Jerry for awhile in preparation for his singing debut on TV. He is a bane to Tom every time one of his guitar strings snap, because he plucks one whisker off Tom's face to replace it. He also appears in Tom and Jerry Tales. He was voiced by Shug Fisher.
Unclo Pecos has grey fur, a guitar, a black cowboy hat, a red scarf, a red nose with a white moustache and blue boots.
- His eyes are never shown in any of his appearances, but his eyes were shown once in Uncle Pecos Rides Again.