As to the how many, it depends on how many players the Pats have already signed plus the number of unassigned draft picks. The closer that number is to 80, the fewer UDFAs. Typically the Pats will sign between 10 and 20 UDFAs with 12 to 15 the most common number. It may increase this year if training camp rosters increase from 80 to 90, but who knows at this point.
As to the how many, it depends on how many players the Pats have already signed plus the number of unassigned draft picks. The closer that number is to 80, the fewer UDFAs. Typically the Pats will sign between 10 and 20 UDFAs with 12 to 15 the most common number. It may increase this year if training camp rosters increase from 80 to 90, but who knows at this point.
Which means 65 signed. Assuming rosters go to 90, we should see a lot of UDFAs early, and then watch them get cut when the draftees sign. Twenty or so right away wouldn't surprise me.