Deebo Samuel, Trent Williams day-to-day; 49ers optimistic on Christian McCaffrey - ESPN

SANTA CLARA, Calif. — One day after three of their most important players left their loss to the Cleveland Browns with various ailments, the San Francisco 49ers seemingly got some good news on the injury front.

On Monday afternoon, Niners coach Kyle Shanahan offered updates on injured receiver Deebo Samuel (shoulder), running back Christian McCaffrey (oblique/rib) and left tackle Trent Williams (right ankle). While the 49ers are awaiting additional imaging on McCaffrey, Shanahan sounded optimistic on all three situations.

Shanahan said Samuel and Williams would be «day-to-day» this week as the 49ers prepare for Monday night's trip to Minnesota to play the Vikings. That comes after Samuel departed in the first quarter Sunday with a shoulder injury and did not return while Williams gritted through the game after spraining his ankle with 3:14 left in the opening quarter.

Shanahan said Williams' injury is not a high ankle sprain. McCaffrey's situation seems a bit more tenuous, as the Niners await further information before offering a diagnosis and a timeline to return. Asked whether McCaffrey could be in position to play through the injury with the use of a flak jacket, Shanahan said he wasn't sure.

«It's obviously a tougher position just because you get hit a lot more,» Shanahan said. «But we've just got to see how it reacts. We've got to see exactly what's wrong with it too because we haven't got that back yet. We say oblique/rib, hopefully it's not both, but we've got to wait to see for sure.»

On Sunday, it was unclear when exactly Samuel and McCaffrey got injured, but Shanahan offered some clarity on that as well. Samuel's shoulder injury came on the first play from scrimmage, an 8-yard run by him on a jet sweep.

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