He initially joined them on tour in 1988 on keyboards, but had to leave for family reasons before he could be made a full member.
Bruce Repka joined the band in 1993 on keyboards & steel.
Phill joined on keyboards in 2002 and took over lead vocals after Pete left the band at the end of that year.
T-T also joined the live lineup on keyboards through summer 2008.
His daughter Ali joined the band on keyboards several times during the tour.
Also that year, Pisapia's brother Guy joined the band on keyboards.
At the same time, Stefan Wagner joined the band on keyboards.
Bob Wiseman joined him on keyboards to perform the record live.
Anna joined the band in 2005 on drums and keyboards.
Ivan Neville joined the group on keyboards for much of the performance.