The Cardinals were back in pads Friday, and it was a good practice as they went along. There were multiple defensive plays being made -- Darius Robinson, you look pretty good -- and multiple offensive plays -- Greg Dortch has been excellent -- and the team looked like it was in a groove.

But things happen, and the thing Friday was when outside linebacker BJ Ojulari went down late in the workout pass rushing on an 11-on-11 play. He was worried about something on his left leg, and while he did need help to get to the locker room with two trainers, it's not like he had to be carted off.

Jonathan Gannon will speak before Saturday's practice so there doesn't figure to be any update before then. But obviously for a team that still had to answer questions about their edge players, any potential injury concern about the team's best pure pass rusher is going to give anyone pause. (If needed, the Cardinals do have an open roster spot after releasing OL Carter O'Donnell before camp.)

"It's football," said right tackle Jonah Williams, who happened to be blocking Ojulari on the play he went down. "I hope he's all right. He's a great player and I enjoy playing with him."

-- Earlier in the day, defensive coordinator Nick Rallis, who has been known to trash talk in practice, smiled when he was told coach Jonathan Gannon was noticing. "I'm upping my game," Rallis said with a smile. "Then I go to my guys and say, 'I just dug myself a hole, make sure we cover Trey (McBride) here.'"

But his defense was up to the task multiple times. Robinson had a "sack" or two and a big running play tackle for loss, and while it's practice, you can see why he can be a playmaker. Linebacker Mack Wilson Sr. jumped to pick off a Desmond Ridder screen pass, and safety Verone McKinley III had his second interception of camp, picking off Clayton Tune on the workout's final play.

-- The offense had their fair share though. Dortch continued his big camp by making multiple impressive catches in 7-on-7, including an impressed one-handed grab of a Tune throw. Michael Wilson, who is also having a good camp, hauled in a nice Kyler Murray bomb (Kyler's deep shots have been good to see and on target).

-- Marvin Harrison Jr. had a nice catch in traffic at one point but it was a throw he couldn't quite pull in -- one-handed leaping in the air -- that caught attention. The fact anyone was thinking he could've underscores the kind of talent he possesses.

-- The Cardinals were still without C Hjalte Froholdt, WR Zay Jones, DL Justin Jones, DL Naquan Jones or CB Kei'Trel Clark, all of whom are nursing undisclosed issues. CB Elijah Jones also left practice on Friday.

-- There is an NFL officiating crew in to work both Friday's practice and Saturday's Red and White practice. They also gave a presentation to players (and later, media) of some of the rules changes and what to expect. Among the highlights:

• A reminder that coaches only have to get one of their two replay challenges correct in order to earn a third this season;
• The hip-drop tackle has been banned -- Kyler Murray getting taken down last season by the method was the first video example shown -- although illegal plays might not always be flagged. However, the league reserves the right to go back and watch plays and fine a player after the fact even if it was not called a penalty.
• Everyone knows about the new dynamic kickoff and how that changes the play. And how teams can only try an onside kick in the fourth quarter if they are trailing. But now teams not only have to let the opponent know the onside is coming, but it is a penalty for the kicking team to kick it beyond the opposing team's 40-yard line -- meaning the receiving team is going to be able to have all 11 players up near the ball and making it even harder to recover for the kicking team.