The Los Angeles Rams added another key player to the COVID-19/reserve list Thursday in advance of a key Week 17 home matchup with the Arizona Cardinals.

Defensive end Michael Brockers joined wide receiver Cooper Kupp on the list. While Kupp reportedly tested positive for COVID-19 and will not play Sunday, there is no indication if Brockers tested positive or was in close contact with somebody that did.

Brockers, whose reason for not practicing Wednesday was listed as “not injury related,” still could play Sunday if he was deemed to have a medium-risk close contact. He would not be able to play if he tested positive or had a high-risk contacted with somebody who was infected.

The Rams already will be without quarterback Jared Goff, who underwent surgery this week for a thumb injury that occurred during Sunday’s loss at Seattle. John Wolford, who has never taken a snap in an NFL game, will start against the Cardinals with a playoff spot on the line.

The Rams would advance to the playoffs with a victory over the Cardinals on Sunday or a Chicago Bears loss to the Green Bay Packers. The Cardinals need a victory to advance to the playoffs for the first time since 2015.

The loss of Brockers would be a blow to a Rams defense that leads the NFL with 286.5 yards allowed per game. The unit also is third in points allowed in the NFL at 19.3 per game.

Brockers, who has 51 tackles and five sacks this season, is a team captain along with Kupp.