Jerry's eccentric uncle, Pecos, a Texan mouse, comes to spend the night with him before his musical performance on television the next day. He decides to rehearse with his guitar for the performance but each time he plays, one of his guitar strings snaps off. Fortunately, he is able to replace them by plucking off one of Tom's whiskers each time. Tom is rather reluctant about this and tries to hide to protect his whiskers from Uncle Pecos.
Unfortunately the movie Pecos Pest is not yet available on HBO Max.
| Visual Effects | Ed Barge | Animation |
| Directing | Joseph Barbera | Director |
| Visual Effects | Ray Patterson | Animation |
| Directing | William Hanna | Director |
| Visual Effects | Irven Spence | Animation |
| Visual Effects | Kenneth Muse | Animation |
| Production | Fred Quimby | Producer |
| Art | Robert Gentle | Background Designer |
| Sound | Scott Bradley | Music Director |
