FRISCO, Texas (AP) — The Dallas Cowboys believe cornerback Trevon Diggs tore the ACL in his right knee in practice Thursday, a person with knowledge of the injury told The Associated Press.

An MRI had yet to confirm the injury, the person told the AP on condition of anonymity because the club had yet to reveal the extent of the injury publicly.

Diggs was seen leaving the team's headquarters on crutches. The 2021 All-Pro had his first interception of the season in last week's 30-10 victory over the New York Jets.

Diggs is tied for the NFL lead with 18 interceptions since entering the league in 2020.

It's quite a blow for a defense off to a great start with 10 sacks and seven takeaways without a turnover by the Dallas offense. The plus-seven turnover margin led the NFL through two games. Dallas is at Arizona on Sunday.

“Saw that I guess a couple of you saw out there on the field,” quarterback Dak Prescott said after practice, not wanting to speculate on the severity of the injury. “Prayers, hoping for the best, simple as that.”

Diggs signed a $97 million, five-year contract extension at the start of training camp. The Cowboys drafted the former Alabama player in the second round in 2020.

Diggs, who tied a franchise record with 11 interceptions in 2021, was off to a strong start in his first season with 2019 AP Defensive Player of the Year Stephon Gilmore starting on the opposite side.

Through two games, Diggs had an NFL-best 1.0 passer rating against when targeted.

Diggs is the second starter to get injured in practice since the regular season started. Left guard Tyler Smith injured a hamstring before the opener and is expected to make his season debut Sunday at Arizona.

Without Diggs, second-year player DaRon Bland is the likely starter opposite Gilmore with Jourdan Lewis playing in the slot. Lewis made his 2023 debut last week after missing most of last season with a broken foot.

Noah Igbinoghene, a 2020 first-round pick by Miami, is another option after joining the Cowboys in a preseason trade.

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