From the video

Video: Big Training Camp Ranking Changes to Know Before You Draft
I'm more fading George KD this year. I think he's too old. The injury to me feels a little bit too serious right now.
Mentioned at 57:30 – 58:25Captured by STACKED 16 hr after posting

STACKED’s take

Positive signalBust

Fading due to age and serious Achilles injury concerns

The source is fading George Kittle this year due to his age and concerns regarding the severity of his recovery from an Achilles injury, preferring to target other options at the position.

George Kittle headshotGeorge KittleTE · SFPlayer page — value, ADP, projections, and every insight