2015 NFL Draft: Mike Mayock's Top 5 Interior Offensive Linemen

Iowa offensive lineman Brandon Scherff (68) blocks during the second half of an NCAA college football game against Northwestern, Saturday, Nov. 1, 2014, in Iowa City, Iowa. (AP Photo/Justin Hayworth)

Florida State center Cameron Erving (75) points out an assignment before a snap against Oregon in the Rose Bowl NCAA college football playoff semifinal, Thursday, Jan. 1, 2015 in Pasadena, Calif. Oregon defeated Florida State 59-20 to advance to the first ever NCAA football playoff championship game. (AP Photo/Doug Benc)

Duke's Laken Tomlinson (77) lines up against North Carolina during the first half of an NCAA college football game in Durham, N.C., Thursday, Nov. 20, 2014. (AP Photo/Gerry Broome)

South Carolina guard A.J. Cann (50) prepares to block a Florida defender during the first half of an NCAA college football game in Gainesville, Fla., Saturday, Nov. 15, 2014. (AP Photo/John Raoux)

Florida State Seminoles guard Tre' Jackson (54) blocks against Oklahoma State Cowboys defensive end Trace Clark (90) during an NCAA college football game at AT&T Stadium on Saturday August 30, 2014 in Arlington, Texas. Florida State University won 37-31. (AP Photo/Aaron M. Sprecher)