The biggest injury on Friday night was the believed to be ruptured patella tendon suffered by the Cardinals 2nd round RB Ryan Williams, who I expect is lost for the season.
Luckily the Green Bay Packers didn't have a significant injury, but they're starting to have a problem with depth on the defensive line. From JS Online:
Another injury scare hit the Packers' defensive line. C.J. Wilson, starting in place of Mike Neal (knee), left Friday's game with a possible concussion. Rookie wideout Randall Cobb also left the game with a left knee bruise while returning a kick in the second half.
When asked about defensive line depth, GM Ted Thompson said "I think we'll have a pretty strong defensive line once we're set to go." It probably did give them more of an opportunity to evaluate some of the other guys in camp, such as undrafted free agent DE Chris Donaldson, who got an extended look. There hasn't been much written about DE Jarius Wynn, but I think the team is pleased with his improvement since late last season. If Wilson did suffer a concussion, he could be held out a couple weeks.
A knee bruise doesn't sound too serious for Cobb, but his absence might have given an opportunity to some of the other backups. WRs Kerry Taylor and Chastin West each caught a TD (while West had a monster game) and WR Tori Gurley had a nice game too.
Here's the list of players who were held out due to injury, from the Press-Gazette:
Clay Matthews, who experienced soreness and tightness in his hamstring and missed practice on Thursday, didn’t play. Joining him in street clothes were: receiver Shaky Smithson (shoulder), receiver Brett Swain (hamstring), safety Brandon Underwood (knee), cornerback Davon House (hamstring), safety Anthony Levine (concussion), tight end Spencer Havner (hamstring), running back James Starks (ankle), guard Adrian Battles (Achilles), tackle Chris Campbell (knee), Guy (concussion) and Neal (knee)