This is how PFF rated Purdy and the 49ers in their epic collapse against the Rams

How PFF graded Purdy and the 49ers in their epic collapse against the Rams originally appeared on NBC Sports Bay Area

Everything was going well for the 49ers until it didn't.

San Francisco's collapse in a 27-24 loss to the Los Angeles Rams on Sunday at SoFi Stadium was marked by a multitude of errors in all three phases of the game, but the performance of several key players kept the club in the lead until the final two seconds of the game.

Quarterback Brock Purdy and wide receiver Jauan Jennings were PFF's highest-graded players on the day. Jennings had a career day, becoming Purdy's No. 1 target in the passing game. The Tennessee product caught nearly everything thrown to him, catching 11 of his 12 targeted passes for 175 receiving yards and a whopping three touchdowns.

As a result, Purdy's stats were also impressive: he completed 22 of his 30 attempts for 292 yards, three touchdowns and a rating of 137.1.

Several 49ers defenders performed strongly, but the defense as a whole made enough mistakes to allow Rams quarterback Matthew Stafford to move the ball down the field effectively, completing 16 of his 25 attempts for 221 yards and a touchdown.

The 49ers had no answer for Rams running back Kyren Williams, who totaled 116 yards from the offensive line – 89 of them on the ground – and three touchdowns. Wide receiver Tutu Atwell almost reached the 100 mark with four catches on five attempts for 93 yards.

Here are the 49ers' PFF grades for Week 3:

attack

QB Brock Purdy – 91.1

Purdy's performance earned him the second-highest overall grade of his career after his 91.7 in 2023 in the club's Week 10 win over the Jacksonville Jaguars

He was under pressure on 18 of his 38 dropbacks (47.7 percent), and when under pressure, he posted a passer rating of 143.4. He completed nine of his 11 attempts for 98 yards and two touchdowns.

Coach Kyle Shanahan called for more plays than in Minneapolis and Purdy took advantage, completing a perfect eight of eight passes for 127 yards and a touchdown with a passer rating of 158.3.

Purdy's strength continues to be intermediate throws from 10 to 19 yards, where he completed nine of his 11 attempts for 156 yards and two touchdowns, helping to achieve an NFL-leading 86.2 percent success rate on those passes through the first three weeks.

WR Jauan Jennings – 90.5

The physical receiver caught 11 of his 12 targeted passes for 175 yards and three touchdowns. The Rams' defenders didn't make it easy for Jennings, who was able to hold on to five contested catches. The only other receiver with five contested catches is Davante Adams of the Las Vegas Raiders, who has five for the entire season.

WR Brandon Aiyuk – 63.1

Aiyuk was on the field for 57 offensive plays (80 percent), caught five of his ten targeted passes for 48 yards and received a grade of 49.2 for his drops.

WR Ronnie Bell – 39.8

The second-year receiver caught one of his three targeted passes for 12 yards, including a crucial drop that could have prevented a total collapse late in the fourth quarter.

Offensive line:

LT Trent Williams – 72.3 pass block grade, three hurries

LG Aaron Banks – 76.5 pass block grade, two hurries

C Jake Brendel – 59.3 pass block grade, three hurries

RG Dominick Puni – 59.5 pass block grade, two hurries

RT Colton McKivitz – 42.8 pass block rating, one sack, one hit, three hurries

Defense:

Defensive line:

Malik Collins – 83.5 pass rush grade, one sack, four hurries

Javon Hargrave – 80.9 Pass Rush Grade – one sack, four hurries

Nick Bosa – 70.7 Pass Rush Grade – one hit, three hurries and all 58 snaps on defense

Sam Okuayinonu – 64.5 Pass Rush Grade – one sack, one hurry

Kevin Givens and Leonard Floyd each caused one pressure, while Yetur Gross-Matos and Robert Beal caused no pressure.

Coverage levels:

S Ji'Ayir Brown – 75.9

Brown allowed one catch on three targets for eight yards

CB Deomodore Lenoir – 61.1

Lenoir allowed one catch on two attempts for six yards.

CB Isaac Yiadom – 58.6

Yiadom allowed a 100 percent catch rate with five allowed catches in as many targets for 52 yards

CB Charvarius Ward – 36.7

Ward allowed three catches on six attempts for 76 yards

LB De'Vondre Campbell – 35.3

Campbell allowed three catches on as many attempts for 53 yards

Odds and ends:

TE Jake Tonges (86.9) received the team's highest run-blocking grade of 88.1 due to his gap blocking.

WR Chris Conley The zone blocking grade of 92.6 was the best on the team.

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