SANTA CLARA – The 49ers just lost 30-28 to the Green Bay Packers on a 51-yard field goal, and now their record is 2-1. Here are the 49ers’ ratings for this performance.

QUARTERBACKS: C-PLUS.

Jimmy Garoppolo was resilient and hung on in the fourth quarter, but he stank before. And he ended the game with a fumble and a quarterback rating of 87.2 – a rating worse than Jared Goff and Jameis Winston against the Packers’ defense this season. Which puts Garoppolo’s modest performance into perspective. Garoppolo’s offense scored just 20 points. Head coach Kyle Shanahan had to call a run for Trey Lance in the red zone to reach 27 points because Garoppolo’s offense is just not good enough against teams with excellent quarterbacks.

TURNERS: D.

Trey Sermon was horrible. He ran 10 times for 31 yards and a touchdown. Take his longest run of the night – a 16-yard runner – and he rushed 9 times for 15 yards. And he was the only full-back to have touched the ball. Three backup backups were performed zero times. More information on this decision below. Full-back Kyle Juszczyk got the ball 9 times and scored a touchdown. He’s the only reason this group doesn’t get F.

WIDE RECEIVERS: C.

Brandon Aiyuk was solid – he caught 4 passes for 37 yards and a touchdown. Deebo Samuel was no good, however. He dropped at least one pass and only caught 50 percent of his targets.

TIGHT ENDS: B.

George Kittle caught 7 passes for 92 yards, but didn’t score and didn’t make an impact as a tackle. And Ross Dwelley still hasn’t had the ball this season. What a parody.

OFFENSIVE LINES: F.

They allowed 4 sacks and 11 quarterback hits to a defense that lacked its leading passer and entered the game with just one sack. Plus, the 49ers couldn’t run the ball either – they averaged less than 3.5 yards per carry for the second game in a row. Shameful.

DEFENSIVE LINE LINES: F.

Generated almost zero pressure against a bad offensive line that was reduced to his left third-string tackle. Nick Bosa was a ghost, as were the rest of the smugglers. Aaron Rodgers had time to do his taxes in his pocket. He also had time to post a 113 quarterback rating. That pass rush just hasn’t been the same without DeForest Buckner.

LINEBACKERS: F.

These guys couldn’t stop the run, and Fred Warner committed a 24-yard pass interference penalty for good measure. Just a horrible performance from the 49ers before seven.

SAFETY: D.

Jaquiski Tartt ceded a 47-yard strike to Marquez Valdes-Scantling, but Jimmie Ward partially redeemed it by knocking out Davante Adams for a free-kick play.

CORNER CORNERS: F.

Josh Norman started in place of Deommodore Lenoir and left almost immediately with a chest injury. Then Lenoir took over and committed a 25 yard pass interference penalty. Nickelback K’Waun Williams also left the game early with a calf injury. Which means the 49ers are paper thin again.

SPECIAL TEAMS: A.

Trenton Cannon had a 68-yard kickoff return and Brandon Aiyuk gained 23 yards on two punt returns. That’s 91 yards of hidden distance, or 9 first tries.

COACHES: D.

Offensive coordinator Kyle Shanahan did a good job building up points without his best running backs. He brought Trey Lance at the right time into the red zone, and Lance gave the 49ers an extra touchdown. This match wouldn’t have been close without him.

But Shanahan, the head coach, didn’t use his three running backs, and he should have, because the starter Sermon smelled awful. If Shanahan didn’t need running backs, he could have activated cornerbacks Dr. Kirkpatrick and / or Ambry Thomas, because he definitely needed them.

Additionally, head coach Shanahan mishandled the clock during the 49ers’ latest offensive attack. They had the ball at the Packers 12-yard line with 43 seconds left, and it was the first down. Green Bay no longer had any waiting periods. The 49ers could have taken all their time and made sure Rodgers never touched the ball again. But Shanahan went for the touchdown, got it, and left Rodgers with 37 seconds to lead the offense for a field goal. And that’s all he needed.

But the biggest goat in this game was defensive coordinator DeMeco Ryans. He had no answers on the final drive, which made it extremely easy for Rodgers to lead the field with no downtime. Ryans also managed to make the Packers’ pathetic offensive line impenetrable. There was nothing he could do to generate pressure, and his high school gave up big play after big play. Almost nothing of what Ryans called worked. What a huge step back from Robert Saleh.

It looks like the 49ers’ defense is a problem. It looked good the first two weeks as he was facing quarterbacks that are no better than Garoppolo. But now he will face Russell Wilson and Kyler Murray back to back.

Good luck, DeMeco.