KANSAS CITY, Mo. -- The Chiefs listed running back Kenneth Walker III as questionable for Sunday's game against the Atlanta Falcons after he missed Friday's practice with a groin injury.

Coach Andy Reid said Walker reported tightness in his groin to the team Friday morning before the Chiefs' final on-field practice of the week, resulting in Walker being held out of the practice as a precautionary measure.

"We'll just see how he feels through this afternoon, with rehab, and through tomorrow," Reid said of Walker. "Somewhere he tweaked it. We're kind of feeling it out just to see where we're at with that [groin]. We're not going to put him at risk. If he can go, he can go. If he can't, he can't."

Walker, who joined the Chiefs in March after signing a three-year, $43.05 million contract, has been one of the NFL's best offseason acquisitions for any team. He enters Week 10 with 872 rushing yards, the second most in the league behind Atlanta's Bijan Robinson (880).

If Walker is unable to play, the Chiefs are expected to rely heavily on rookie running back Emmett Johnson, the fifth-round pick who has played most often on third downs. In eight games, Johnson has been effective as a runner (111 rushing yards and one touchdown on 26 attempts) and a receiver (237 yards and one touchdown on 14 receptions).

"He'll be ready to go," right guard Trey Smith said Friday if Johnson makes his first career start. "I like Emmett, man, his juice, his energy. He oozes enthusiasm, emotion and positive energy. You can tell the guy wants to be great and you can tell he works at it. He really cares, man. I'm really excited for him. It's not hard to root for guys like that."

Meanwhile, the Chiefs expect to have wide receiver Xavier Worthy available after he left in the second half of last week's win over the Jets with a hamstring injury. That should take a little pressure off Josh Downs, who intends to play after being acquired from the Colts just before the NFL trade deadline Tuesday in an attempt to build out their depth at the position.

"I thought he did a nice job for what we asked him to do, to digest everything in a couple days," Reid said of Downs. "He's a smart kid and knows how to play. He's been playing, which is great, and playing at a high level. He worked into the things we asked him to do and did well. I think he's ready to play in a game for us."

Downs had 33 catches for 354 yards and a touchdown in nine games with Indianapolis.

The Chiefs expect to have first-round pick Mansoor Delane back after the cornerback missed a couple of games with a shoulder injury, though they likely will be without right tackle Jaylon Moore because of an ankle injury and Peter Woods due to a neck injury.

Information from the Associated Press was used in this report.