Callahan signed with the Lions' practice squad Saturday.

EDGE Analysis

Callahan worked out with the Lions last week and now officially joins the practice squad while Jeff Driskel (hamstring) heads to injured reserve. Kyle Sloter was signed off the Cardinals' practice squad and will serve as the backup to David Blough until Matthew Stafford (back) is ready to return.

Callahan worked out with the Lions on Tuesday, Aaron Wilson of the Houston Chronicle reports.

EDGE Analysis

The Lions could be forced to add another quarterback to their roster with usual starter Matthew Stafford (back) unlikely to play on Thanksgiving Day, while primary backup Jeff Driskel is nursing a hamstring injury of his own early in the week. The Lions also put free agent quarterback Taryn Christion through a workout, so Callahan isn't the only candidate. Callahan may have the upper hand, however, given his past preseason experience in Green Bay.

Callahan was cut by the Ravens on Friday.

EDGE Analysis

Callahan was competing with Trace McSorley for the third quarterback position on the Ravens' depth chart, but ultimately did not come through. The journeyman signal-caller will now look for a new destination.

Callahan signed a contract with the Ravens on Monday, Mike Garafolo of NFL Network reports.

EDGE Analysis

Callahan's chance with the Ravens comes with Robert Griffin sidelined due to a thumb injury. Since going undrafted out of Wesley in 2016, Callahan has spent most of his time on practice squads around the league.

Callahan was waived by the Buccaneers on Friday, Field Yates of ESPN reports.

EDGE Analysis

Callahan went undrafted in 2016 before ultimately earning an appearance with Green Bay in 2017. He was waived by the Eagles prior to Week 1 of the 2018 season and subsequently spent most of his time on practice squads. He signed a reserve/future contract with the Buccaneers in January, but will now be looking for his next opportunity.

Callahan signed a reserve/future contract with the Buccaneers on Wednesday, Greg Auman of The Athletic reports.

EDGE Analysis

Callahan signed with the Eagles last year but was waived at the end of the preseason. The 25-year-old has spent most of his time on practice squads since going undrafted in 2016, but did make once game appearance in 2017 with Green Bay.

Callahan was waived by the Eagles on Friday, Tom Pelissero of NFL.com reports.

EDGE Analysis

Callahan was released alongside fellow quarterback Christian Hackenberg. The Eagles' quarterback room is now made up of Carson Wentz, Nick Foles and Nate Sudfeld, with no confirmation of who will start under center Week 1 against the Falcons. Having spent the majority of his career on practice squads, Callahan will become an unrestricted free agent if he goes unclaimed on waivers.

Callahan will sign a contract with the Eagles, Eliot Shorr-Parks of NJ.com reports.

EDGE Analysis

Callahan has spent the bulk of his career on practice squads, but was able to get on the field to make his NFL debut with Green Bay in 2017, completing 5-of-7 passes for 11 yards against the Lions in Week 17. He was ultimately cut by the Packers at the end of April and will now head to Philadelphia, where he could battle for the No. 3 job behind Carson Wentz (knee) and Nick Foles. Whether he makes the roster or not, Callahan will need a lot of help in order to become a fantasy relevant player.

The Packers released Callahan on Monday.

EDGE Analysis

An undrafted free agent, the Division III product fared well enough during the 2016 preseason to make the Packers' final 53-man roster. After he was waived in mid-October of that year, Callahan proceeded to spend time with the Saints and Browns, but landed back in Green Bay by season's end. In 2017, he alternated between the Packers' practice squad and 53-man while also spending time as a street free agent. Callahan finally got his shot on the field Week 17, completing five of seven passes for a measly 11 yards. The offseason addition of DeShone Kizer likely made Callahan expendable as general manager Brian Gutekunst rounds out the 90-man roster afforded NFL teams in the offseason.

Callahan has been tendered by the Packers, Rob Demovsky of ESPN.com reports.

EDGE Analysis

Callahan has spent most of his young career in Green Bay, either on the active roster or practice squad. The Packers will head into offseason activities with four quarterbacks, as Callahan will compete with Deshone Kizer and Brett Hundley for the backup role.