For a while now the McCaffrey question has never been about what he can do, only whether he'd be available to do it. We read the practice reports on Wednesdays, watched for the word limited, and made lineup decisions on injury designations. He answered it last year by playing all seventeen games and winning Comeback Player of the Year, and then the camp tightness in August put us right back to reading reports.
Week 1 handed us something we hadn't rehearsed. He was healthy, he was on the field, and a rookie outcarried him.
McCaffrey has been a workhorse long enough that a split backfield has no place in how we think about him, and when something has no place we tend to overreact to it in whichever direction we were already leaning. So before the reaction, the line.
He ran it ten times for 68 yards, 6.8 a carry, and caught five of eight targets for 20 yards. Eighteen touches, 88 yards, and he did it while cramping. He also led the team in targets, and six of those eight came in the first half, the same half where the carry count looked thin. Whatever the backfield split did, it never reached the passing game, and the passing game is where most of his value lives.
That doesn't make it nothing. A rookie taking 14 carries to his ten is real information and we'd be kidding ourselves to wave it off. What we can't answer yet is whether it's the new arrangement or a one-week accident, and we'd rather say we're watching than pretend we know.
Shanahan gave us both answers, which doesn't help.
He said balancing the workload was the goal coming in, whether through Kaelon Black or through getting Deebo Samuel some carries. That's the design reading, and it fits. San Francisco spent a third-round pick on Black for exactly this, he picked up the offense quickly, Purdy described him as violent and explosive and quick to read the gaps, and he turned his carries into 65 yards and three first downs.
He also said he was a little surprised Black finished with more than McCaffrey, called it not deliberate, and pointed out that only three of the first seventeen plays were runs. Then McCaffrey cramped and briefly left. The accident reading fits too.
There's a third explanation sitting in the box score and we'd rather name it than look like we're avoiding it. This was 27-7 in Melbourne, and blowouts hand carries to backups. But Black's ninth carry came late in the third quarter, earlier than garbage time starts, and twenty-eight snaps is a role rather than mop-up work. The score explains part of the gap, not the shape of it. We don't get to pick between the readings, and deciding without knowing is most of the job.
Now the part that changes how we read all of it.
McCaffrey played all seventeen games last season and set career highs with 311 carries and 413 touches, the most in the league. He averaged 3.9 yards a carry doing it, which ranked 40th among qualifying backs. He also caught 102 passes for 924 yards and scored seventeen times, ten on the ground and seven through the air, and finished as the overall RB1. The rushing efficiency was genuinely poor and he still won leagues, because the receiving volume and the touchdowns covered it.
That 3.9 got read all offseason as decline. Watch the Rams game and another explanation presents itself. Against a defense expected to be one of the better units in football, he went for 6.8 a carry.
Ten carries is a small sample and we're not going to pretend otherwise, but a back at 3.9 on 311 carries and a back at 6.8 on ten are usually two different players, and it's at least possible they're one player at two different workloads. The 311 came while the 49ers were patching over injuries everywhere else on offense, and he logged 927 snaps doing it. Somebody running that often is running into tired legs and stacked fronts by November.
Which is the case for Black being good news rather than bad. Shanahan's run game is built on outside zone, and the carries Black is taking are the grinding early-down work that wears a back down across a season. Somebody absorbs those hits. For two years San Francisco had nobody they trusted to, so McCaffrey absorbed all of them.
The trade is worth seeing plainly... McCaffrey taking everything and probably breaking down, which his career has demonstrated more than once, or a slightly smaller share of a back who still has his legs in January. At 30, the first option is asking the position for something it rarely gives.
And he's worth the patience, because the skill set is rare. Vision, burst, contact balance, and hands that work like a receiver's. That's the combination everybody is trying to draft. He isn't Derrick Henry, who has stayed elite running a style that should have cost him years ago, and very few backs are. McCaffrey's game runs on the legs being fresh, and volume is the thing that takes them.
So we're not downgrading him. We think he plays well this year, and the version we get might be more explosive than the one we watched grind through last season. Our read is that a top-ten finish is very much on the table and the top five is a harder ask, which is a different outcome than a mid-first-round pick was drafted for and a long way from a bust.
Three things we're watching Sunday.
Touchdowns first. San Francisco scored three times through the air against the Rams, to Samuel from fifteen, Mike Evans from two, and Demarcus Robinson from thirty-nine, and McCaffrey wasn't any of them. Evans drew two red zone targets in his debut and has built a career on the throw he converted. A back who scored seventeen times last season getting no work inside the five in a game his offense reached the end zone three times is the number we keep coming back to. One game proves nothing, but goal-line work is where his ceiling gets built.
Then Black's health. He was limited Thursday with a groin issue, was back on the field to start Friday's practice, and goes into the home opener questionable. Asked how optimistic he was, Shanahan said a questionable amount of optimism. If Black sits, Jordan James works behind McCaffrey, the split conversation pauses, and we learn less this week than we otherwise would.
And whether any of it repeats with McCaffrey feeling fine. That's the clean test, and Miami is where we get it.
He starts. And the first time San Francisco gets inside the five on Sunday, that one snap tells us more than the carry count will.