Blackstock is the second Cavalier junior to announce this week that he will skip his senior season next fall, joining all-America tight end Heath Miller.
Blackstock, a 6-4, 240-pounder from Newport News, Va., led all linebackers in the nation with 11 sacks in 2004.
Also declaring in the last two days were junior wide receiver Dante Ridgeway of Ball State, who set a Mid-American Conference record with 105 catches for 1,399 yards, and Nebraska safety Josh Bullocks, who had two interceptions this season and 10 in 2003.
Among others who already have declared are running back Frank Gore and wide receiver Roscoe Parrish of Miami, quarterbacks Walter Washington of Temple and Aaron Rogers of California, Maryland defensive end Shawne Merrriman and defensive back "Pac-Man" Jones of West Virginia.
Celebrity Couples of 2014 [PHOTOS]