FILE - Former Los Angeles Chargers quarterback Philip Rivers watches warmups before an NFL football game between the Chargers and the Denver Broncos, Dec. 10, 2023, in Inglewood, Calif. (AP Photo/Ryan Sun, File)

INDIANAPOLIS — The Indianapolis Colts bolstered their injury-depleted quarterback corps Tuesday by bringing 44-year-old Philip Rivers out of retirement and signing him to the practice squad, a person with knowledge of the deal told The Associated Press.

The move comes less than 24 hours after Colts coach Shane Steichen confirmed Indy’s starter, Daniel Jones, would miss the rest of this season after tearing his right Achilles tendon and backup Riley Leonard injured his right knee during Sunday’s loss at Jacksonville.

Rivers hasn’t taken a snap since finishing his career with a playoff loss following the Colts 2020 season. That was the last time Indy (8-5) made the postseason. The eight-time Pro Bowler announced his retirement in January 2021 and has been coaching St. Michael High School in Fairhope, Alabama, ever since.

But it’s not clear how long it will take Rivers to learn Indy’s playbook — or work his way into game shape — as the reeling Colts try to snap a three-game losing streak next weekend at Seattle (10-3).

“Things happen, wacky stuff has happened in this league, your depth gets tested, your resolve gets tested as you get thrown into some adversity as a unit, as a coaching staff, as a position group,” offensive coordinator Jim Bob Cooter said.