Jefferson posted 12 tackles (eight solo), two forced fumbles, and one pass defended in Sunday's domination of the Lions.

Jefferson was involved in two of the Lions' four first-half turnovers, the last of which resulted in the Cardinals' fourth touchdown of the second quarter. He was otherwise around the ball frequently, as Detroit's one-dimensional offense racked up 70 pass attempts, handing a number of tackle opportunities to the Cards' secondary. Still, he logged 72 of 95 defensive snaps (76 percent), which was a slight boost in his usage (64 percent) from the first four games of the season, meaning his output is likely dependent on the opponent on a weekly basis.

Jefferson (hamstring) is listed as active Sunday against the 49ers, Mark Dalton of the Cardinals' official site reports.

Jefferson wouldn't hold such a significant role as a backup safety in the typical defense, but the Cardinals trot out 5-to-6 defensive backs on most snaps, meaning his heavy usage (77 percent of the defensive snaps) isn't out of left field. He's responded with 14 tackles (13 solo) and one interception for a touchdown on the season.

Jefferson logged 54 of the Cardinals' 72 defensive snaps Sunday at Chicago, Mike Jurecki of FOX Sports 910 Phoenix reports.

While five members of the secondary picked up more snaps than Jefferson, the third-year safety put together the most relevant IDP line, recording nine solo tackles, one tackle for loss, and an interception return for a touchdown. Through two games, he's been afforded 76.7 percent of the snaps on defense, which will likely continue due to the Cardinals' usage of five and six defensive backs on most plays. The preceding is encouraging for his fantasy prospects, but his status as Deone Bucannon's (groin) backup at strong safety could produce the occasional clunker as the season proceeds.

Jefferson's role for the upcoming season is uncertain, ESPN.com reports.

Jefferson played just 53.9 percent of the defensive snaps after Week 5 last season, despite doing a solid job when on the field. The Cardinals are still loaded at safety, with Jefferson joined by Rashad Johnson, Tyrann Mathieu, Deone Bucannon and Chris Clemons. In nickel and dime packages, Mathieu figures to work as a slot corner, with Bucannon potentially serving as a linebacker. There's still a lot of competition for snaps, and Jefferson hopes he'll get on the field more often if he improves his ability to cover tight ends. Bucannon, Mathieu and Johnson are all more intriguing IDPs than Jefferson, but it's possible that could change if Jefferson replaces Johnson as a starter.

Jefferson accrued 78 tackles (70 solo), two tackles for loss, one sack, and one forced fumble during the 2014 season.

Jefferson was among six Cardinals defensive backs to log at least 60 percent of the defensive snaps -- 64.2 percent, to be exact -- according to Football Outsiders. Because defensive coordinator Todd Bowles was forced to rely upon his safeties and corners more than normal due to the precarious nature of the linebacking corps, Jefferson responded with the fourth-most tackles on the team. However, a few offseason developments -- LB additions via free agency or the draft, Tyrann Mathieu achieving greater health -- could keep Jefferson on the sideline more often than not next fall.

Jefferson recorded five tackles (three solo) during Sunday's win versus the Chiefs.

As expected, Jefferson's workload increased with Tyrann Mathieu on the sideline tending to a broken left thumb, as the former took the field for all 65 of the Cardinals' defensive snaps, FOX Sports 910 Phoenix reports. In two games with an expanded snap count, Jefferson hasn't quite achieved his early-season success -- 32 tackles and one sack in this season's first four contests -- during the final stages of Mathieu's recovery from ACL and LCL tears suffered last December. However, with 10 tackles (seven solo) added to his game log, he hasn't exactly failed IDP owners either.

Jefferson will experience an uptick in snaps due to the broken left thumb suffered by Tyrann Mathieu this past Sunday in Atlanta, the Cardinals' official site reports.

During the first four games of the season, Jefferson logged significant time in the secondary due to Mathieu's continued recovery from last December's ACL and LCL tears, which forced one DNP and three subsequent limited showings. During that span, Jefferson accumulated 32 of his 62 tackles on the year, which he supplemented with a sack. Because the Cardinals trot out 5-to-6 defensive backs on most snaps, he has a great opportunity to replicate his early-season production.

Jefferson (concussion) is listed as active Sunday in Dallas, the Cardinals' official site reports.

It's unclear how many snaps Jefferson will be able to muster following last weekend's concussion, especially with a healthy Deone Bucannon available to man strong safety. However, Jefferson has been one of the most reliable producers in the Cardinals' defensive backfield -- 50 tackles (45 solo) and one sack in seven games -- making it unwise to sit him in IDP circles.

Jefferson (concussion) is questionable for Sunday's game against Dallas.

Jefferson received concussion clearance earlier this week and practiced fully Friday, but he still remains questionable on the injury report. It's possible that the Cardinals will be extra cautious with Jefferson since they have all of Deone Bucannon, Tyrann Mathieu and Rashad Johnson at safety.

Jefferson (concussion) is eligible to play in Sunday's game against the Cowboys, after clearing the final step of the NFL's concussion protocol Thursday, Kent Somers of the Arizona Republic reports.

Jefferson is seemingly now on track to play, but he was limited at Thursday's practice, after which he said that he didn't remember parts of Sunday's win over the Eagles, ESPN.com reports. He also said that he doesn't want to rush back from a concussion, as one might expect. Jefferson has an impressive 50 tackles (45 solo) through seven games, but with four Cardinals safeties getting significant playing time, his snaps and tackles had both tailed off in recent weeks, until Sunday's 12-tackle effort against the Eagles.

Jefferson (concussion) was limited in Thursday's practice but must complete another step in order to emerge from the league's concussion protocol, Kent Somers of the Arizona Republic reports.

Typically, tests must be conducted 48 hours apart, so Jefferson may enter the weekend with questionable status, if he remains embedded in the protocol. An absence would result in Deone Bucannon taking over at strong safety, but consider the situation fluid for the time being.

Jefferson (concussion) didn't practice Wednesday, as he has yet to be cleared from the league's concussion protocol, the Cardinals' official site reports. After drills, coach Bruce Arians said, "He feels very good today, so we feel encouraged that he'll go through the test tomorrow."

If he passes the test, Jefferson will likely follow in the footsteps of fellow defensive back Patrick Peterson, who cleared the protocol for head injuries Wednesday. Jefferson has so far fended off 2014 first-round pick Deone Bucannon for starts at strong safety, but his current medical concern could provide an opportunity for the rookie to take over. In any case, Jefferson's status could be clarified as early as Thursday, so stay tuned.

Jefferson will endure the league's concussion protocol this week, Kent Somers of the Arizona Republic reports.

In Sunday's win against the Eagles, Jefferson topped all Cardinals defenders with 12 tackles (11 solo), to which he added one pass defended and one quarterback hit. However, upon waking Monday morning, the defensive back was suffering through concussion symptoms, which will be monitored as the week continues. If the ailment lingers, 2014 first-round pick Deone Bucannon could vault into the lineup at strong safety, but Jefferson's recovery will ultimately determine such a development.

Jefferson accrued five solo tackles during Sunday's defeat in Denver, while logging all 81 defensive snaps, FOX Sports 910 Phoenix reports.

As part of a bruised Cardinals defense, the entire secondary is picking up significant run under coordinator Todd Bowles. Initially believed to be a placeholder for 2014 first-round pick Deone Bucannon, Jefferson has yet to relinquish strong safety and leads the team with 31 tackles (27 solo). If current trends hold, both Jefferson and Bucannon should hold sway in IDP formats for the foreseeable future.

Jefferson accumulated 10 tackles (eight solo) and one sack in Sunday's victory against the 49ers.

Through three games, Jefferson has already surpassed his production as an undrafted rookie last year, when he totaled 24 tackles (19 solo) and nothing else. With eight, eight, and 10 tackles on the ledger, he's been consistent while holding down the strong safety spot intended for 2014 first-round pick Deone Bucannon (foot). Their respective snap counts Sunday -- 52-of-64 for Jefferson, versus Bucannon's 43, according to FOX Sports 910 Phoenix -- were much tighter than in Week 2 (70 versus 37), meaning the situation will be one to watch going forward. In the meantime, though, Jefferson's performance seems to be enough to hold IDP relevance in numerous formats.

Jefferson notched eight tackles (seven solo) in Sunday's victory against the Giants at New York.

Jefferson replicated exactly his Week 1 line, as he continues to ward off 2014 first-round pick, Deone Bucannon, at strong safety. According to FOX Sports 910 Phoenix, their respective snap counts this past Sunday are telling -- 70-of-72 defensive snaps for Jefferson, versus 37 for Bucannon -- with no change expected at the position due to Jefferson's steady play.

Jefferson is listed as the Cardinals' starting strong safety on the initial depth chart of training camp, Darren Urban of the team's official site reports.

Despite his status as an undrafted free agent last year, Jefferson was active for all 16 games and managed 24 tackles (19 solo). Nonetheless, the organization selected Deone Bucannon in the first round of the 2014 NFL Draft, placing a shadow over Jefferson's status in the defensive backfield. However, Jefferson has responded by taking all the first-team reps during OTAs and minicamp, which has extended into training camp. Barring an injury, he should line up as a Week 1 starter.