The Rams placed safety Cody Davis on injured reserve Friday, leaving questions about depth and experience at the position as the team prepares to face the New York Giants in East Rutherford, N.J., on Sunday. Davis, an often-used backup who started twice, suffered a thigh injury against the Jacksonville Jaguars nearly three weeks ago and has not played since. “It’s unfortunate, but he had that quad that just wasn’t getting any better,” coach Sean McVay said after practice. “Want to be smart, give him a full chance to recover.” Davis will be sidelined for at least eight weeks. Despite losing Davis, a fifth-year pro who has intercepted a pass and deflected three others, McVay said he felt good about his lineup. Lamarcus Joyner, who was sidelined for three weeks because of a hamstring injury, intercepted a pass in his return against the Arizona Cardinals, and rookie John Johnson III has made three starts since taking over for Maurice Alexander, who has since been waived. “I’ve gotten my feet under me and played a few games,” said Johnson, a third-round pick from Boston College. “So I feel great.” Johnson has intercepted a pass and deflected three others.