Here’s an article from Business Insider that looked at the 1,700-ish players in the NFL and their home state. Michigan is well behind the top talent producers, but it’s actually #12, which isn’t bad.
http://www.businessinsider.com/nfl-rosters-by-state-2016-9
Naturally, Florida, Texas, and California produce a lot more NFL talent, which we’ve known for a long time. That’s one reason why I like the Greg Frey hiring (Florida), and it would be nice if Michigan’s connections in Texas and California could lead to a few more signings from those states, too.