NOW COMES THE HARD PART

EVEN THE RAVENS HAVE WORK TO DO FOR 2013, AND IT STARTS NOW. SI ASSESSES AND ADDRESSES THE MOST PRESSING ISSUES FOR ALL 32 TEAMS, BEGINNING WITH THE SORTS OF TROUBLESOME NUMBERS THAT KEEP G.M.'S AWAKE AT NIGHT

PHOTO ILLUSTRATION

Illustration by GLUEKIT

RICH GABRIELSON/ICON SMI (STOKLEY); AL TIELEMANS (FLETCHER, WILSON); RICH KANE/ICON SMI (PACE); FRED VUICH (WEEDEN); JEROME MIRON/US PRESSWIRE (CUSHING); BRUCE KLUCKHOHN/USA TODAY SPORTS (DAVIS); CHRIS SZAGOLA/CAL SPORT MEDIA (KUECHLY)