49ers PFF grades: Best and worst grades from Week 17 win vs. Bears

The San Francisco 49ers returned home in Week 17, as they hosted the Chicago Bears at Levi's Stadium for a Sunday night showdown, and Kyle Shanahan's team earned a 42-38 victory.

San Francisco's offense continued to shine in this matchup, with Brock Purdy throwing three touchdowns and rushing for another two. However, Robert Saleh's defense left a lot to be desired, as they allowed Chicago to move down the field without much pushback.

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As we continue to review this game, let's take a look at the Pro Football Focus grades to see who they believe were the best and worst 49ers on the field against the Bears.

Overall PFF grades: Offense (min. 10 snaps)

Top 5

• TE Luke Farrell - 91.8

• TE Jake Tonges - 86.7

• QB Brock Purdy - 81.9

• LG Spencer Burford - 81.5

• RB Christian McCaffrey - 81.1

Bottom 5

• LT Austen Pleasants - 70.7

• WR Demarcus Robinson - 68.3

• WR Ricky Pearsall - 67.4

• FB Kyle Juszczyk - 58.0

• WR Jauan Jennings - 57.7

Overall PFF grades: Defense (min. 10 snaps)

Top 5

• DE Keion White - 82.4

• LB Tatum Bethune - 73.8

• DL Jordan Elliott - 68.8

• CB Deommodore Lenoir - 64.5

• DL C.J. West - 62.8

Bottom 5

• DL Kalia Davis - 43.9

• DE Sam Okuayinonu - 43.6

• DE Bryce Huff - 41.2

• S Ji'Ayir Brown - 37.5

• CB Chase Lucas - 36.8

Pass protection grades (OL only)

• C Jake Brendel - 85.8

• RT Colton McKivitz - 84.5

• LG Spencer Burford - 80.1

• RG Dominick Puni - 75.6

• LT Trent Williams - 69.3

• LT Austen Pleasants - 58.6

Run-blocking grades (OL only)

• LG Spencer Burford - 76.7

• LT Austen Pleasants - 74.8

• RT Colton McKivitz - 69.9

• C Jake Brendel - 68.6

• RG Dominick Puni - 67.7

Pass-rush grades (front-seven only, min. 10 pass-rush snaps)

• DE Keion White - 81.6

• DE Yetur Gross-Matos - 73.7

• DL C.J. West - 68.7

• DL Jordan Elliott - 66.1

• DL Alfred Colins - 57.1

• DE Clelin Ferrell - 51.2

• DL Kalia Davis - 50.9

• DE Sam Okuayinonu - 45.8

• DE Bryce Huff - 41.3

Coverage grades (min. 10 coverage snaps)

• LB Tatum Bethune - 79.3

• CB Deommodore Lenoir - 72.3

• S Malik Mustapha - 66.9

• CB Darrell Luter Jr. - 60.8

• LB Dee Winters - 59.4

• CB Upton Stout - 53.4

• S Ji'Ayir Brown - 40.6

• CB Chase Lucas - 29.9

More 49ers: Brock Purdy passes predecessor to move into 7th in 49ers passing TDs

This article originally appeared on Niners Wire: 49ers PFF grades: Best and worst grades from Week 17 win vs. Bears