Lord Scalious
Shut up World
I assume you are talking about Mychal Kendricks. There are a few issues though
1) Unless this is a straight up trade (Butler for Kendricks), or even NE draft picks thrown in, I do not see the Eagles going along. Currently they do not have a 2nd or 3rd round pick guaranteed. They have one 1st round, three 4th round, two 5th round and one 6th round pick. One of the 4th round picks is from NE (as a result of the Rowe trade), that might turn into NE's 3rd round pick (if Rowe plays 50% of the defensive snaps).
In other words, the Eagles cannot afford to trade away even more draft picks, especially when looking at the needs this team has for the immediate future: OT and RB, OLB (and maybe C and G) on the top of their list.
2) Mychal Kendricks, although not playing a lot of snaps, is currently playing very well - even though playing a limited number of snaps. Also, he is the best depth LB we have on the outside. Losing him would definitely hurt the defense a lot.
Add to that the (potential) depth the Eagles currently have at CB (and the amount invested in it), and it simply makes little sense to add Butler. It was only one game, but as it is even with all the injuries the CB's look servicable (something not the case last season). And that is with the most probable 2018 starters out (in Jones and Darby), and Darby likely to return in about 4 weeks. Darby is not even on IR as it is. And Jones is on the NFI list (and in theory could play this season).
If the Eagles were on a serious SB run, I might see it happening, but as it is they are not (at least as projected for this season). Goal is to qualify for the play-offs; and with the current state of the division (as well as the NFC as a whole) that is a realistic goal without adding Butler.
Kendricks plays limited snap counts and makes over 7M a year until 2019. The Truth is probably that both players are being viewed as rentals. For both Eagles and Patriots only 2017 needs are the angle. So the DB injuries are the and clearing a contract for a depth LB off the books and start fresh in 2018 is the Eagles incentive.