FWIW ...
Francois turns 31 this Thanksgiving Day. He posted ~average testing numbers for his size at the 2009 Combine - similar to Brown and Valentine, although about 20 lbs lighter than them.
Played his first four seasons with SFO, primarily as a reserve/relief DT/NT in a 4-3 defense
... 51 games active/5 starts .. 49TT, 2 PD, 1 FF, 3 SK
Signed as a UFA with IND in March 2013; released Feb 2015 (2 seasons)
... 37% of defensive snaps in 2013 as DT/DE in Manusky's 3-4 ... 61% in 2014
... 26 ga/23 st .. 58TT, 8 PD, 1 FR, 5.5 SK ... 1050 D-snaps in 2 seasons
Signed as a SFA with WAS in Feb. 2015; released March 2017 (2 seasons)
... 36% of snaps in 2015; 40% in 2016
mostly as a high-use rotational DE in Joe Barry's 3-4
... 32 ga/8 st .. 57 TT, 2 PD, 3.5 SK ... 800 D-snaps in 2 seasons
Signed as a SFA with GBY in March. Made the roster out of Camp, but cut Sep. 12. Re-signed Sep 21 and stayed with the club till Nov. 1st. Was active for 6 games as a reserve DT in Capers' 3-4 with GBY, but played only 60 D-snaps.
Seems to have potential to be a decent reserve/spot-relief guy for the Pats; experience playing in 4-3 and three versions of the 3-4, so shouldn't have huge difficulty picking up Patricia's DL concepts. Possibly just a temp until Valentine makes it back.