Yeah, Michael McD, while being a pretty good singer, wasn't really a good fit for the Doobies. I rank him up there with Peter Cetera when he took over lead vocals for Chicago.
yup...
don’t think it charted but this is one my favorite new era songs from 1991
Dangerous
https://www.youtube.com/watch?v=l8g9p6H5iPA
But Cetera was there from the beginning and sang on a lot of Chicago songs, before he (and David Foster) took over the band. Plus he was a damn good bass player.