What two members of the original Mousketeers went on to play drums with what two hit-making acts?

Question

One, was also the lead singer of his band in the sixties. The other, drummer in the back-up band of a popular duo in the seventies.

Come to think of it, both have Irish surnames!

Answer 1

Just for the record, I waited 10 hours to see if someone else would (or could) answer this...for obvious reasons.

The two are Dickie Dodd and Cubby O'Brien.
Dodd was the lead singer and drummer for the Standells..best known for their hit "Dirty Water"
O'Brien's tie-in with hit makers, was when he played drums for the Carpenters.