I would suggest something like (untested):
    perl -ane "print unless $F[2] =~ m{ \A (?: [[:alpha:]] | Jr) \. \z }xms" in.file > out.file
Update: or with in-place editing (which I didn't notice at first) (also untested):
    perl -i.orig -ane "print unless $F[2] =~ m{ \A (?: [[:alpha:]] | Jr) \. \z }xms" in.file

See perlrun.

Update: BTW: What did you say about the results you got when you tried the code in the OP? You did at least try it, didn't you?

In reply to Re: On Match Remove Field by AnomalousMonk
in thread On Match Remove Field by rfransix

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