Vernon Davis was still on crutches today, three days after he was injured in the fourth quarter of a 28-20 loss to the Bears, but Jim Harbaugh suggested the Pro Bowl tight end has a chance to play Sunday at Arizona.

Both Davis (ankle) and tight end Vance McDonald (knee) didn’t finish the game Sunday. McDonald also isn’t practicing today.

“Feel like we dodged a bullet with Vernon,” Harbaugh said. “And hopeful it will be a healthy position by the end of the week.”

Davis missed a Week 3 game against the Colts last year because of a hamstring injury, but has been very durable: He’s played in 108 of 109 games dating to 2007.

Meanwhile, cornerback Tramaine Brock (toe), right tackle Anthony Davis (hamstring) and defensive tackle Justin Smith (day off) also aren’t practicing. Brock is expected to miss his second straight game because of a sprained big toe, according to a source.

Left tackle Joe Staley was in his uniform, but remained in the weight room during the first 15 minutes of practice, which is open to the media.

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Cardinals backup running back Jonathan Dwyer has been arrested for suspicion of domestic violence, 3 TV in Phoenix first reported. Per CBS, Dwyer was arrested for aggravated assault and preventing someone from calling 911. The Cardinals have deactivated Dwyer.

In a release, the Phoenix Police Department said Dwyer was arrested for two separate incidents in July, FOX Sports reported. The Phoenix PD listed two victims: a 27-year-old female and an 18-month-old child. The counts against Dwyer include aggravated assault of a minor and aggravated assault causing a fracture.

The Cardinals have released a statement: “We became aware of these allegations this afternoon when notified by Phoenix police and are cooperating fully. Given the serious nature of the allegations we have taken the immediate step to deactivate Jonathan from all team activities. We will continue to closely monitor this as it develops and evaluate additional information as it becomes available.”

Dwyer, 25, is in his first year with the Cardinals after spending his first four seasons with the Steelers. He’s rushed for 51 yards on 16 carries and scored a touchdown this season.