Lazar has an article about the Pats UDFA signings, but the most interesting thing about his article is the list of UDFA who have made the team over the past 18 years:
More often than not they got a damned good player as a UDFA. You could almost assemble a team of these guys.
DB: Jackson, Butler, Jones, Gay, Coleman, Lockett
LB: Langi, Fletcher, Guyton, Woods
DL: Butler, Love, Forston, Francis, Vellano,
OL: Andrews, Kline, Barker, Croston, Maneri
TE: Hollister, Sudfeld
RB: Bolden, Taylor, Foster
WR: Meyers, Harper, Thompkins, Olszewski
QB: Hoyer, Gutierrez
ST: Allen (P), Nordin (K), Aiken (LS), Olszewski (KR)
Not much for front 7, OL, TE, safeties, RBs, or WRs. But damned good corners!