For the most part, it was outstanding. By the end of the season, six rookies essentially were starters. And that's why Pro Football Focus ranks the 49ers' rookie class seventh among the 32 NFL teams ...

San Francisco's PFF grades from the 40-34 defeat show high ... The running game was less productive, even with Isaac Guerendo’s return and Deebo Samuel and Pearsall's contributions.

Jordan Mason (153 carries, 789 yards) and Isaac Guerendo (82 carries ... NFL-low nine broken tackles on 405 rushing attempts. Per PFF data, Skattebo has forced 102 missed tackles, only trailing ...

Bijan Robinson: If we were coming off a typical season — one in which a 1,400-yard, 12-TD running back was actually a rare ...

Nick Bosa took all but 10 of his snaps against the Lions' Penei Sewell because he wanted to see how he matched up against the ...

Achane led all backs in routes run according to PFF (408), playing the most slot ... force over the first month of the season and Isaac Guerendo was a key-to-victory player in the closing weeks.

He'll be tasked with not only keeping an eye on Purdy all game long, but also with keeping tight end George Kittle and running back Isaac Guerendo in ... tackles and a 75.4 PFF overall grade).

Shanahan said Isaac Guerendo (hamstring ... more tackles in each of their first seven NFL seasons. While Samuel had PFF’s highest grade for a 49ers offensive player, Winters had that honor ...