From the episode

Not in a way that I would trust him in any way, shape or form in a lineup. I mean, you can theoretically because of the rushing upside. But as we saw, you know, today, that can be that can come and go.

STACKED’s take

Negative signalProjection

McCarthy is not trustworthy in lineups; rushing upside is unreliable.

JJ McCarthy is not trustworthy in fantasy lineups despite 252 yards against the Texans; Kanate Mumfield explicitly states 'Not in a way that I would trust him in any way, shape or form in a lineup,' citing unreliable rushing upside compared to elite dual-threat QBs like Josh Allen or Lamar Jackson.

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