As a Bills fan, lemme shed some light on J.P. Loss Man.
Dude never got a fair chance with the Bills. He started for 1 year and actually had decent numbers. Especially when you consider he only had one weapon (Lee Evans). But he used him well, as Evans had a career year that year.
The next year, new coaching staff came in and were never committed to him. He got hurt and the Bills fell in love with that bum Trent Edwards.
That pretty much summed up his career. Sure he didn't do anything anywhere else but damn the Bills shat on their young QB for no reason at all and probably destroyed his confidence in the process.