One thing that always impressed me about the old prog dudes was how they got around. They do an album or two with one band, then move on to another project. My question is this:
"What prog musician (or singer) participated in the most number of different prog bands?"
Here are the rules:
1. "Participation" means they got credit on at least one professionally produced studio or live album. Simply touring with a band as a fill-in doesn't count, unless they appear on a live album. And bootleg recordings don't count.
2. The prog bands only count if they are listed here in PA. Working with bands that are considered jazz or pop or some other (non-prog) genre doesn't count. Cross-over and Prog-Related are OK to include.
3. We're not counting total albums -- just total bands. A band is considered different if it has a different name. Vast lineup changes under the same name are still considered the same band.
4. List the bands and at least one album for verification.
I really don't have a clue who would top this list, but I suspect that guys like Alan Holdsworth or John Wetton would be high on the list.