From the video

Video: 12 Must Draft SLEEPERS in Fantasy Football (Davis Mattek)
I think it's just one of these players where if you're building out your team structurally, you're able to get use him as like a a spot starter as in the flex... he hand-picked Keaton Mitchell.
Mentioned at 42:38 – 45:01Captured by STACKED 18 hr after posting

STACKED’s take

Positive signalSleeper

High-upside sleeper hand-picked by Mike McDaniel

Keaton Mitchell is a high-upside sleeper hand-picked by Mike McDaniel, projected for 10 touches per game as a flex or spot starter; he maintains significant contingent upside should Omarian Hampton miss time, with approximately 185 touches available in the offense.

Keaton Mitchell headshotKeaton MitchellRB · LACPlayer page — value, ADP, projections, and every insight