From the video

Jordan Mason is on the IR now... he's he's got a broken thumb. He had surgery on it to fix today
Mentioned at 42:06 – 42:28Captured by STACKED 11 hr after posting
STACKED’s take
Negative signalInjury
Mason is on IR following thumb surgery
Jordan Mason has been placed on IR due to a broken thumb that required surgery, significantly impacting the 49ers' backfield usage.
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