Draft Headquarters Week Eight Stock Watch

Flipping the page to the second half of the year, one offensive lineman is starting to cement himself as an elite prospect in the 2012 NFL Draft. IN addition, a few other prospects are proving that they deserve more recognition at the national level.. Here is Draft Headquarters Week Eight Stock Watch:

Risers

David DeCastro OG Stanford - No player in the country is drawing more rave reviews than Stanford offensive guard David DeCastro. A polished interior offensive lineman that has the size (6'5, 310) needed to step in and start immediately at the next level, DeCastro has proven to be a flat out dominant blocker so far this season. A drive blocker off the line of scrimmage in the run game, David also offers deceptive mobility with a strong ability to pull through and kick out the defensive lineman, leaving a gaping hole for the running back to run through. A more polished and physically imposing offensive lineman than Maurkice Pouncey last year, DeCastro has a realistic chance of cracking the Top 15 if he continues to dominate the way he has so far this season.

Leonard Johnson CB Iowa State - Having the opportunity to take in the Iowa State  - Texas A&M game in Ames, Iowa this past weekend, the player that I came away most impressed with from the game was Cyclones cornerback Leonard Johnson. There's no doubt he gave up size to A&M's Jeff Fuller, however I felt that he did a terrific job of mirroring the big, physical receiver down the field. A confident, fiery player whose motor runs throughout the game, Johnson has the tools and necessary skillset to develop into a fine nickel or dime back for a team at the next level. While his size could hold him back from being a No. 2 or No. 3 receiver, I feel that Johnson offers the type of instincts that you can't coach at the cornerback position.

Sean Porter OLB Texas A&M - Tied for third in the country with 7.5 sacks through seven games so far this season, Sean Porter is picking up right where Von Miller left off for the Aggies. An electric defender to play all over the field, Porter has the skillset to play both inside as well as outside; he also has plenty of experience covering a receiver in the slot. Sean offers the natural burst and ability to rush the passer that you look for in a 3-4 outside rush linebacker. With such a weak pass rushing class at the top of this year's draft class, Porter could easily fill a void in 2012 if he opts to declare for the 2012 Draft. Porter has very high potential and upside as a pass rusher.

Josh Chapman DT Alabama - An unheralded player on the top-ranked Crimson Tide defense, Josh Chapman is a major reason why Alabama ranks first in the country in run defense (1.67-yards per carry, 44.88-yards per game). A stout interior presence who acts as a fire hydrant with his outstanding ability to hold his ground at the point of attack, Chapman has the raw strength as well as the athleticism to play up and down the defensive line and prove to be a productive player. He projects as a terrific one-technique in the 4-3 defense for a team at the next level. With such a weak defensive line class this season, Josh has the type of skills that defensive coaches covet, which could result in him rising throughout the second half of the season and into offseason workouts.

Adam Gettis OG Iowa - One player who has been overshadowed by teammate Riley Reiff is Iowa offensive guard Adam Gettis. Although thinner than you'd prefer at 6'4, 280 lbs, Gettis is an athletic interior offensive lineman whose quickness and flexibility make him an ideal prospect for a team that runs a zone blocking scheme. While Gettis isn't a highly-rated player, he's one that people will want to keep an eye out for, as scouts are beginning to move him up their draft boards.

Fallers

Trumaine Johnson CB Montana - Just a few short weeks after being listed as a riser here on the Draft Headquarters Stock Watch, Trumaine Johnson did what no small school player can afford to do: get arrested. Reportedly forced to be tased before being arrested, Johnson was at a party that had the police called due to a noise complaint. While he won't fall out of the draft entirely, this is not good news for a player who some considered to be the top sleeper in the country.