In case it wasn't already clear, Justin Jefferson's good friend let everyone know the Vikings star is indeed the King of the Griddy ... by gifting the wideout a custom pair of 'Griddy' cleats last week!!!
"Jets" was given the awesome spikes by cleat artist Luke Dangler at the receiver's first-ever Jets Youth Football Camp on May 28 in Minneapolis, Minnesota.
TMZ Sports has learned Dangler brought the items -- which took around 40 hours to make -- as a thank you gift to Jefferson after the 22-year-old football player had extended him a special invite to the camp.