Source John Henry Johnson (Wikipedia)
Source John Mackey (American football) (Wikipedia)
Source John McDermott (Gaelic footballer) (Wikipedia)
Source John Murphy (Derry Gaelic footballer) (Wikipedia)
Source Johnny Blood (Wikipedia)
Source Johnny Doyle (Gaelic footballer) (Wikipedia)
Source Wikipedia, Johnny Lujack
Source Johnny Unitas (Wikipedia)
Source Josh Allen (Wikipedia)
Source Josh Keane (Wikipedia)
Source Jude McAtamney (Wikipedia)
Source Julian Edelman (Wikipedia)
Source Kenny Easley (Wikipedia)
Source Kevin O'Brien (Dublin Gaelic footballer) (Wikipedia)
Source Kieran Martin (Wikipedia)
Source Kurt Warner (Wikipedia)
Source Lamar Jackson (Wikipedia)
Source Lance Alworth (Wikipedia)
Source Lar Foley (Wikipedia)
Source Larry Allen (Wikipedia)
Source Larry Csonka (Wikipedia)
Source Larry Fitzgerald (Wikipedia)
Source Las Vegas Raiders (Wikipedia)
Source Lawrence Taylor (Wikipedia)
Source Lem Barney (Wikipedia)
Source Len Dawson (Wikipedia)
Source Len Ford (Wikipedia)
Source Wikipedia, Leon Hart
Source LeRoy Butler (Wikipedia)
Source Liam Hinphey (Wikipedia)
Source Los Angeles Chargers (Wikipedia)
Source Los Angeles Rams (Wikipedia)
Source Lou Creekmur (Wikipedia)
Source Luke Connolly (Wikipedia)
Source Marcus Allen (Wikipedia)
Source Marshall Faulk (Wikipedia)
Source Matt Ryan (Wikipedia)
Source Mel Blount (Wikipedia)
Source Merlin Olsen (Wikipedia)
Source Miami Dolphins (Wikipedia)
Source Michael McBride (Gaelic footballer) (Wikipedia)
Source Michael Oher (Wikipedia)
Source Michael Vick (Wikipedia)
Source Mike Ditka (Wikipedia)
Source Mike Henry (American football) (source article)
Source Minnesota Vikings (Wikipedia)
Source Morten Andersen (Wikipedia)
Source Myles Garrett (Wikipedia)
Source New Orleans Saints (Wikipedia)
Source New York Giants (Wikipedia)
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