Need help with this Jim Brown Autograph

[Middy4]

Bought a large collection of cards from one of my buddies late father about a week ago. There were a handful of autographs including Reggie Jackson, Jason Kidd, James Worthy and Jim Brown. All the others seem legit to me, however I figured a few outside opinions would be beneficial before I send them off for authentication. What do you guys think of this Jim Brown autograph?

https://uploads.tapatalk-cdn.com/20190107/c9426b5519af9ea0c7bbd1ea3a85a24b.jpg


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[marinocollector]

Looks like a stamp.

[crpalmi]

Don't know on the auto but have always loved the story on that card as he made the photographer take the picture in that spot as he had just bought the Caddy that is in the parking lot behind him and wanted to show it off.