Mannish Boy by Muddy Waters is played in the key of A at a intermediate difficulty level, originally released in the 1950s. It uses 1 chord — A7 — arranged in the I progression.
About the I progression
This song is built on the I progression. Follow the chord order in the diagrams above, and use the transpose controls if the key doesn't suit your voice.
Playing in the key of A
A major is rock and blues territory. A, D, and E are open shapes; F#m requires a barre. The E7 chord sits naturally under the fingers in this key, which is why it feels made for country and blues players.
Related songs
More songs in the key of A
More songs using the I progression
Learn to play Mannish Boy by Muddy Waters on guitar. It sits in the key of A and uses the I progression with the chords A7.