(Photo credit: Junfu Han / USA TODAY NETWORK)

Losses are piling up for the Detroit Lions since taking their first defeat of the season on Sunday.

Among key personnel expected to miss time are safety CJ Gardner-Johnson, running back David Montgomery and pass rusher James Houston.

Gardner-Johnson posted a picture of himself in uniform facing his locker with the caption "won't be long."

A few minutes later, he changed the caption to only a Honolulu blue heart as reports circulated that Gardner-Johnson was out for the rest of the season with torn pectoral muscle.

Earlier Monday, the Lions said Houston was headed to injured reserve with a right ankle injury and Montgomery is dealing with a quad injury he said Monday will take "a couple of weeks" to heal.

Houston left Ford Field on Sunday wearing a boot on his right foot, and surgery could be a consideration for what is reportedly a fractured ankle.

Coach Dan Campbell said Houston would be out "for a while" in his postgame update Sunday. NFL Network reported Monday that Houston's ankle is fractured, with a recovery window of six to eight weeks.

Campbell called Gardner-Johnson the "heartbeat" of the Lions' defense.

Gardner-Johnson signed a one-year, $8 million deal to join the Lions in free agency. He played for the NFC champion Philadelphia Eagles last season and was previously with Detroit defensive coordinator Aaron Glenn when Gardner-Johnson began his career with the Saints.

Houston, 24, didn't become a regular until late November last season, and he wound up posting eight sacks in seven games. In Week 1 of the 2023 season, he had a 30 percent pass-rush win rate at Kansas City.

The 2022 sixth-round draft pick left the Sunday loss to Seattle after posting one tackle.

Montgomery, 26, also left Sunday's game, getting carted off at the start of the fourth quarter with a thigh bruise. He did not return after rushing for 67 yards and a score. Montgomery has started both games this season, rushing for 141 yards and two TDs.

--Field Level Media