Jeffcoat showed off a relentless motor and strong, forceful hands to attack and fight through blocks, winning with his competitive edge to work through the whistle. He isn't an elite athlete and lacks ideal ankle and hip fluidity, but his fast play speed was tough for Texas Tech to handle. Jeffcoat arrived in Austin with a lot of hype, and while his collegiate career hasn't gone quite as expected, the skills he showed last Thursday are why he has a NFL future, likely as a top-100 draft pick. - Dane Brugler, NFLDraftScout.com
Operating with his hand in the dirt as well as a stand-up pass rusher in defensive coordinator Manny Diaz's aggressive scheme, Jeffcoat exploded a year ago to register more tackles (71) and tackles for loss (21) than batterymate Alex Okafor and tied him for the team lead with eight sacks, but was recognized with "only" second-team honors from the league's coaches despite his big statistics.
The son of former Dallas Cowboys and Buffalo Bills' standout Jim Jeffcoat, Jackson has greater upside as an NFL pass rusher than Okafor but remains a bit hit or miss, at this time.
NFL scouts want to see a big senior season from him, but he simply hasn't responded so far. (10/14/13)
Weaknesses: Despite displaying quickness off the edge and the toughness to attack the body of the edge blocker, Jefferson doesn't do much after initial contact. He struggles to get creative with his rush moves and he doesn't use his hands correctly to shed blocks or keep blockers from his frame. The Oklahoma game was a microcosm of Jeffcoat's senior season -- even his highlight tape is extremely average.