Roy Jones would embarrass Silva
Can't say for sure, but I think a Roy Jones boxing match would be a nightmare for Anderson Silva, after seeing his latest outing. Prior to the KO from Weidman, Silva was not able to connect with a single punch, even though Weidman stayed in range. Weidman actually out out-pointed Silva in both rounds. Weidman and Silva have identical reaches, which is something Silva is not used to. He'd have a tiny reach advantage against Jones, but nothing significant, and Roy Jones' ability to slip punches in the pocket would be lightyears ahead of Weidman's.
Something tells me Silva is reconsidering that endeavor. In fact, I'm not sure now he'd fair very well against Diaz or GSP who also have very similar reaches to him and good head movement. Couple that with GSP's TD abilities and hand speed and the problems are compounded.