In the 64 years since Los Angeles Rams owner Dan Reeves and his chief bird-dog scout, Eddie Kotal, founded the modern scouting industry, NFL teams have learned the value of the holy trinity of drafting -- size, speed and strength. These physical traits are the equivalent of a bar exam -- you can't become a lawyer without passing that test, and you can't make an NFL roster without excelling in at least one of those areas. Teams rely on the three S's so much that they are the overwhelming determinant in deciding who is placed at the top of a draft board.
3hSam Khan Jr. and Greg Ostendorf
1hYuan Fang, ESPN.com
10mPHOTOGRAPHY BY SERENA DE SANCTIS for ESPN
10hMike Vorkunov for REDEF