Quoting Bruce Feldman on Twitter...

Quote Originally Posted by ‏@BFeldmanCBS
NFL teams credentialed for Chick-fil-A Bowl to see Manziel, Jake Matthews & Mike Evans & co: #Browns; #Steelers; #Titans & #Rams.
Rotoworld elaborates...

The Cleveland Browns, Pittsburgh Steelers, Tennessee Titans and St. Louis Rams were chosen to attend the Chick-fil-A Bowl between Duke and Texas A&M.
A lottery system is employed by the NFL for all bowl game evaluation credentials, so we bet many more wanted to attend the event. Three of the four could be considering a quarterback fairly early in the draft.