The Ravens’ already struggling secondary suffered another blow Wednesday, with safety Kyle Hamilton missing practice because of a back injury.

The third-year All-Pro was one of a half-dozen players absent from practice in Owings Mills, where Baltimore has been preparing for Sunday’s game against the Dallas Cowboys in Arlington, Texas. The Ravens are trying to avoid their first 0-3 start since 2015.

Several other notable players were also missing because of injury or personal reasons.

That included left tackle Ronnie Stanley (ankle), though coach John Harbaugh said that the 30-year-old will play Sunday.

“A couple guys had some things from the game that we didn’t want to practice them today,” Harbaugh said. “It’s not anything major.”

Others who likewise didn’t practice and were listed on the injury report included outside linebacker Kyle Van Noy (eye/groin) and cornerback Nate Wiggins (neck/concussion).

Wiggins, the Ravens’ first-round draft pick this year, has been out since getting in a car accident last week. He didn’t play against the Raiders on Sunday at M&T Bank Stadium, though Harbaugh said earlier this week that he’s “hopeful” Wiggins would be available against the Cowboys, and the cornerback was in the locker room on Wednesday following practice.

Meanwhile, wide receiver-kick returner Deonte Harty (calf) was limited and rookie outside linebacker Adisa Isaac (hamstring) was a full participant. Isaac has yet to play in a game this season, but being a full participant for the first time is a good sign for the third-round draft pick.

Cornerback Jalyn Armour-Davis and guard Sala Aumavae-Laulu were both absent for personal reasons.

For the Cowboys (1-1), wide receiver CeeDee Lamb (ankle), cornerback Trevon Diggs (foot) and defensive tackle Mazi Smith (back) all did not practice.

Tight end Jake Ferguson (knee), wide receiver Brandin Cooks (rest), safety Malik Hooker (shoulder), linebacker Eric Kendricks (rest), defensive end DeMarcus Lawrence (rest), cornerback Jourdan Lewis (rest) and guard Zack Martin (rest/knee) were all listed as limited.