No he did not
No
The Phelps's family has not released such information.
He isn't dead.
Michael Phelps Mom: Alive Dad: Alive
Michael Brinton died in 2012.
Michael Bzdel died in 2012.
Phelps Phelps died on 1981-06-10.
No, as of June 2012, Michael Gambon is still alive.
Michael DeBose died on 2012-04-23.
Michael Mussa died on 2012-01-15.
Michael Sands died on 2012-04-06.
Michael Boesen died on November 29, 2012.