The Kansas City Chiefs have placed running back Clyde Edwards-Helaire on the non-football injury (NFI) list. The move, reported by ESPN’s Field Yates, means the fifth-year veteran will be ineligible to play during the team’s first four regular-season games.

The Chiefs said Edwards-Helaire had missed several training camp practices due to an illness. He also has not participated in practice sessions leading up to the defending Super Bowl champions’ Week 1 matchup with the Baltimore Ravens.

Edwards-Helaire, 25, revealed on social media in late July that he was dealing with PTSD and explained to reporters that he’s experienced nausea and vomiting because of it, sometimes requiring hospitalization.

According to Edwards-Helaire, he has been struggling with PTSD since a 2018 incident while he was in college at LSU. He was one of two players attempting to sell an electronic item and shot someone attempting to rob them, according to Baton Rouge police.

Edwards-Helaire described the incident as “a self-defense situation.” Sources confirmed to the Associated Press and WAFB-TV at the time that he was indeed one of the players involved. Charges were never filed against the players and they were released. A prosecutor eventually said the two responded with justifiable force.

The Chiefs’ 2020 first-round draft pick (No. 32 overall), Edwards-Helaire is entering his fifth season. After a promising first two seasons, he lost his starting position to then-rookie Isiah Pacheco in 2022. Last season, Edwards-Helaire rushed for 223 yards on 70 carries while appearing in 15 games.

While Edwards-Helaire is on the NFI list, Kansas City also has running backs Samaje Perine and rookie Carson Steele on the roster behind Pacheco. Rookie Emani Bailey was signed to the team’s practice squad.

The Kansas City Chiefs are trying to do something no team has ever done: win three straight Super Bowls.

The rest of the NFL is trying to stop them.

Here are the key elements of the Chiefs’ success, which will again play a role in their quest — and could provide clues to how other teams can unseat the kings of the NFL.

Other stories in series: How past 3-peat bids failed | Steve Spagnuolo’s genius | What if Travis Kelce hits wall?

The Kansas City Chiefs’ pursuit of an unprecedented three straight Super Bowl titles is one of the top stories of the NFL season. Everyone knows they have the quarterback and coaching to do it, but now they’ll be relying on some new faces to help them achieve that goal as well.

Head coach Andy Reid’s playbook is one of the most complex in the NFL, and notoriously difficult for rookies to pick up, especially wide receivers. But general manager Brett Veach has drafted well the past few years, and receiver Rashee Rice played an integral role as a rookie last season in the Chiefs’ Super Bowl championship.

Here are four offensive rookies to keep an eye on as the Chiefs get ready to defend their throne for the second straight season.

The Chiefs’ 2024 first-round draft pick is going to play a huge role in helping them try to get back to the Super Bowl and pull off the sacred three-peat. Worthy has concerns surrounding his frame and how being 165 pounds will translate to the NFL, but his speed can’t be replicated by any other Chiefs wide receiver. The deep threat he presents showed up in training camp and preseason. If he can perform like just an average NFL wide receiver, that would be a huge boost to a Chiefs offense that had to slog through actively hazardous wide receiver play last season.

Worthy, along with offseason addition Hollywood Brown and Rice, is hoping to be the “real” receiver the Chiefs were missing last year. With Patrick Mahomes onboard, no one is asking Worthy to be a world beater. Just be better than the last guys. That should be an attainable goal for a rookie who is set up to be a big-time contributor for the long haul.

Kingsley Suamataia, OT

Upside, upside, upside is the name of the day when it comes to Suamataia, the Chiefs’ second-round draft pick last spring.

Suamatia is a bit raw, but he’s going to have the runway to learn and harness his athletic gifts with Reid and Andy Heck, who is regarded as one of the best offensive line coaches in the league. Suamataia is going to immediately open as the Chiefs’ left tackle and it might look rough at times, but it’s hard to find 330-pounders who are as athletic as he is.

Like Worthy, in a world where Mahomes is the quarterback, there’s a greater room for error than other rookies. It would be great if Suamataia was a shutdown left tackle from Day 1, but that might not be feasible considering he was nearly a third-round pick. Still, the upside is here for the Chiefs to have one of the best offensive tackles in the league if he develops on the right timeline.

Jared Wiley, TE

Wiley could be the gem of the Chiefs’ draft class when all is said and done. The former TCU tight end, selected in the fourth round, doesn’t have the path to a whole bunch of snaps right now with future Hall of Famer Travis Kelce still on the roster, but he’s a really good athlete for a player of his size (6-foot-6, 249 pounds) and should make an impact in limited reps.

This is more of a stash pick that can pay off dividends in the future, but even in a spell role, Wiley should be able to show off the athleticism that made him an early Day 3 draft pick.

Carson Steele, RB

No one really had this guy pegged for a role in the Chiefs’ offense prior to the season, but it appears that this undrafted free-agent running back will be actually playing for the team.

After running for 87 yards and two touchdowns on just 11 carries in the preseason, Steele found himself with a secure spot on the Chiefs’ 53-man roster. He’s currently the second running back on the Chiefs’ depth chart (behind Isiah Pacheco) with Clyde Edwards-Helaire slated to miss the first four games of the regular season.

Who knows if Steele can make an actual impact, but his tape in the preseason was good enough for him to be here. The Chiefs’ running game could use a huge boost after a rough 2023 season and Steele might be the guy to do that. At the very least, he’s a new option to try in the backfield.