Worrilow (groin) underwent surgery on Thursday and is expected to be sidelined for at least four weeks, Vaughn McClure of ESPN.com reports.
Worrilow, the Falcons' leading tackler the past three seasons, was replaced by rookie Deion Jones in the starting lineup this season and has yet to record a stat this season. Philip Wheeler will move back to inside linebacker with the linebacking core thinned out due to Worrilow's and De'Vondre Campbell's (ankle) current injuries. The Falcons also signed O'Brien Schofield on Wednesday to give the team a little added depth for Week 3's tilt with the Saints.
Collins tallied 17 total tackles in 16 games during his rookie year with the Falcons.
Collins was limited to rotational work, only seeing the field on 28.6 percent of the total defensive snaps. He'll likely earn more playing time in the coming years, but the Falcons have a pretty young core of secondary players, meaning it won't be easy for Collins to ascend the ranks.
Davison (shoulder) has been ruled inactive for Monday's tilt with the Falcons, Josh Katzenstein of The Times-Picayune reports.
Davison recorded four tackles in Week 2's loss to the Giants, but also sustained a shoulder injury during the process. He was considered questionable heading into Monday's game, but has ultimately been ruled out. John Jenkins figures to fill in for the Fresno State product at left defensive tackle.
Ellerbe (quadricps) will not make his season debut in Monday's matchup with the Falcons, Josh Katzenstein of The Times-Picayune reports.
The veteran linebacker has yet to take the field this season as he recovers from a quadriceps injury. He projects to start at weakside linebacker when healthy, but Craig Robertson has been filling in at the position during his absence.
Snead (toe) is listed as inactive Monday against the Falcons, Josh Katzenstein of the New Orleans Times-Picayune reports.
It'll be all hands on deck for the Saints in Week 3, with a number of starters, including Snead, unavailable. While Brandin Cooks is an unassailable option in the passing attack, Drew Brees will now look to get Michael Thomas, rookie Brandon Coleman, and offseason pickup Coby Fleener more involved in the offense.
Vaccarol (ankle) is listed as inactive for Monday's game against the Falcons, Josh Katzenstein of The Times-Picayune reports.
Vaccaro recorded nine tackles and a forced fumble in Week 2's loss to the Giants, but also came out of the game with an ankle injury. He was unable to practice throughout the week, which ultimately led to a questionable designation for Monday's contest. Roman Harper figures to fill in for Vaccaro in his absence.
The Saints released Brown (calf) with an injury settlement Thursday, removing him from injured reserve, the New Orleans Times-Picayune reports.
Brown joined the Saints in May, adding a veteran presence to a receiving corps lacking in experience. However, he failed his pre-training camp physical due to a strained calf, which will bring his brief tenure in New Orleans to a close. The severity of the injury will likely determine when he receives a chance with another organization.