Christian McCaffrey
McCaffrey is the engine of the 49ers offense and their leading rusher and receiver, but he's carrying a late-week back issue on top of an illness, so this is a monitor-until-kickoff situation rather than a role question.
Role
True three-down workhorse: he leads San Francisco in rushing yards (~849) and receiving yards (~806) and in touchdowns (13), which means he's handling both the bulk of the carries and a receiving-back target load that functions like a slot receiver's. Brian Robinson Jr. is the clear No. 2 (about 4.6 yards per carry) and is the one who absorbs snaps if McCaffrey is limited or out; nobody else is a threat to his workload when healthy.
He was a full participant Friday after the illness, the back issue only appeared on the Saturday report, and San Francisco has leaned on him all year with quarterback and tight end injuries around him — when he's dressed, he's a bell-cow with elite receiving volume and touchdown equity.
He's a back-injury add-on 24 hours before kickoff who already missed practice time that week for illness, he's on the wrong side of 29 with a long soft-tissue/lower-body history, and Kyle Shanahan's 49ers have previously downplayed a McCaffrey issue right up until a surprise pregame scratch. A back problem that lingers can quietly cut his snaps even in games he plays.
Where analysts split
Not about his role — nobody disputes he's the focal point. The disagreement is how to read the 49ers' messaging: whether the Saturday back designation is a precautionary listing for a player who practiced fully, or the same pattern that preceded an earlier late-scratch, and relatedly whether a soft opponent gives San Francisco an excuse to rest or ration him.
Research confidence: thin. Outlooks are grounded in web search over current reporting and refreshed through the season.
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