They can sign more undrafted free agents if they want (and they will).
I can see the connection with Lee. The Chiefs drafted Cameron Sheffield in the fifth round of the draft. Sheffield comes from Troy. So it makes sense that the Chiefs would have spent some time with him.
Remember, UDFAs can choose who they want to sign with (assuming there are options) so Lee might feel he has a shot. We've talked about the Chiefs inside linebacker situation. I think it might need some help.
We don't really have much information on the 6'1", 238 pound Lee. He isn't on any of our draft interests chart. Although the Chiefs did scout at least one Troy game this year.
The only Boris Lee talk we've had on AP comes from user troy145, who is obviously a Troy fan.
As of now, we're filing this one under unconfirmed. I do feel good about this happening because it makes sense the sports editor of the Troy, AL paper would know about Troy University players.
[Update: Looks like it's just an invite to the Chiefs rookie mini camp. Thanks KcChiefsfan506]