DEFENSIVE LINEMEN
Tim Jamison (Houston Texans):
Week 2: None
Week 3: 5 total tackles (4 solo)
Week 4: 1 assist, 0.5 sacks
Week 5: None
Jamison has played on over 30 snaps in each game since the start of the season, but he hasn't recorded much in the way of stats. In four of the five games, he's come off the bench in a rotational role. However, he got a start in Week 3, his most productive game of the season.
Mike Martin (Tennessee Titans):
Week 2: 2 total tackles (1 solo)
Week 3: DNP
Week 4: 3 total tackles (1 solo)
Week 5: None
Martin hasn't seen a lot of action in 2014 after struggling with some injuries during preseason. In three games (Weeks 2, 4, and 5), he's played on 102 snaps and recorded 5 combined tackles (2 solo). He came off the bench in Weeks 2 and 5 and started in Week 4.
LaMarr Woodley (Oakland Raiders):
Week 2: None
Week 3: 1 tackle assist
Week 4: None
The Raiders suck, and Woodley isn't doing much to help. He didn't start in Week 2 but did in Weeks 3 and 4. That didn't matter. Woodley seems to be a pretty non-existent part of Oakland's defense. On the year, he has four QB hurries and no sacks. Through four games, these stats are downright bad.
LINEBACKERS
Kenny Demens (Arizona Cardinals):
Week 2: 2 solo tackles, 1 forced fumble
Week 3: 1 solo tackle
Week 5: 1 solo tackle
Demens is still backing up Foote in Arizona, so his playing time is limited. He's still managed to record at least one solo tackle in each game and forced a fumble in Week 2 that led to a field goal for the Cardinalsf.
Larry Foote (Arizona Cardinals):
Week 2: 8 combined tackles (4 solo), 1 interception, 1 pass defended
Week 3: 6 combined tackles (5 solo)
Week 5: 5 combined tackles (4 solo)
There's a reason Demens hasn't played much this year: Foote hasn't missed a single defensive snap all season. His signing by the Cardinals this offseason looks like a steal through four games as he's been a huge part of their strong start to the season.
Brandon Graham (Philadelphia Eagles):
Week 2: 1 combined tackle
Week 3: 2 combined tackles (2 solo), 1 forced fumble
Week 4: 3 combined tackles (2 solo), 1 sack
Week 5: 3 combined tackles (3 solo), 1 forced fumble
After an offseason of speculation that he was going to be cut/traded and a dominant performance in Week 1, Graham is still in Philadelphia, even though his performance seems to be fairly inconsistent. He was one of the worst Philly defenders in Week 2 and the best in Week 5. He's still struggling when dropping back in coverage, but he's been a dominant force in the pass rush.
David Harris (New York Jets):
Week 2: 7 combined tackles (4 solo)
Week 3: 5 combined tackles (4 solo), 1 sack, 1 forced fumble
Week 4: 9 combined tackles (1 solo)
Week 5: 10 combined tackles (8 solo)
In his 8th season in the NFL, Harris continues to be a consistent tackle machine in the center of the Jets defense. He's played on 98.2% of the defensive snaps this season, but he suffered a sprained shoulder joint in last week's game and is currently day-to-day.
SECONDARY
Stevie Brown (New York Giants):
Week 2: 1 combined tackle, 1 pass defended
Week 3: 2 combined tackled (1 solo)
Week 4: None
Week 5: None
After a week start to the season, Brown lost his starting spot and is currently coming off the bench in New York. Why was he benched? Simple: poor performance. Barring an injury to the rookie replacing him, it's unclear if Brown will have a shot at the starting job again this season.
Leon Hall (Cincinnati Bengals):
Week 2: 6 combined tackles (5 solo), 2 passes defended, 1 interception
Week 3: 2 combined tackles (2 solo)
Week 5: 8 combined tackles (4 solo)
Leon Hall is one of the best cornerbacks in the league. Prior to last week, he had only allowed 12 receptions for 87 yards, which is comparable to Richard Sherman and Patrick Peterson (two guys who are always at the top of the NFL cornerback rankings). He dominates when he's asked to cover the slot, and he's only missed time this year due to being pulled late in games for rest.
Jordan Kovacs (Philadelphia Eagles):
After being released by the Miami Dolphins in the final round of roster cuts prior to opening day, Kovacs has finally found a new home in Philadelphia. The Eagles signed Kovacs to their practice squad on Oct. 6. Hopefully a change of scenery leads to more playing time for the Walk-on Wonder.
Ryan Mundy (Chicago Bears):
Week 2: 7 combined tackles (6 solo)
Week 3: 2 combined tackles (2 solo), 1 interception returned for TD
Week 4: 8 solo tackles
Week 5: 4 combined tackles (1 solo)
Mundy started 2014 with some solid performances, including a pick-six in Week 3. However, his production has dropped off significantly since then. Windy City Gridiron has given the Bears safeties a D-grade for two consecutive weeks, and Mundy's been partially to blame. He's not making "impact plays," and while he led Chicago in tackles in Week 4, most of that came as a result of "chasing down an awful lot of plays."
Charles Woodson (Oakland Raiders):
Week 2: 9 combined tackles (8 solo)
Week 3: 4 combined tackles (3 solo), 2 passes defended
Week 4: 3 combined tackles (3 solo), 1 passes defended, 1 fumble recovered
"We suck." Those were the words spoken by Charles Woodson following a Week 2 loss against the Houston Texans. Three weeks later and two more losses, I'm sure he'd feel the same way about his team. At 0-4, it's already unlikely that the Raiders make anything of their season, and it look likes the recently turned 38-year old Woodson will be wasting another year of his career in Oakland. He's currently leading the team in tackles and passes defended. Following Week 4, Woodson had this to say regarding his situation: "It kind of is what it is, you know? I guess this is what I signed up for."