Would think there is more to come.
(Apparently I wrote a post about Knapp responding to stuff above that never went through). So...
I know the Phillies will once again be pinching pennies against the CBT, but if the idea is that a new catcher would cost $2-3 million while Knapp is $1.2 million (his MLBTR projection) and Marchan $600K, I could see them just keeping Knapp, with a minor league free agent also in the mix.
He can't possibly be as bad as he was last year, the pitchers love him, he still has positional/utilitarian value as a SH who can play the field, and that's also the easiest path to giving the Marchan the job mid-season. Alternately, you could upgrade at the deadline if Marchan isn't ready, or gets traded itself.
Really depends just what kind of back-up catcher you want, and for how much. I mean, Kurt Suzuki only made $1.5 million last year. Wilson Ramos, $1 million. Hard to see them going for a $3 million guy (that's what Zunino and Vogt made)