Andre Reed says he could definitely see Stefon Diggs returning to the Bills next season ... but he tells TMZ Sports the star wideout's wallet could be a little bit lighter if that's indeed the case.
Diggs' future in Buffalo appears to be in question this offseason ... as his 2024 cap figure has ballooned to nearly $30 million -- and, at times in his career, he's seemed upset with his role on the team.
In fact, even Diggs himself said at the Pro Bowl on Friday, "I can't tell you what the future holds.