Yeah, what it looks like to me. I'm guessing his winter coat will grow in normal. Hopefully I continue to get pictures through the fall.

Hair-loss syndrome in deer | Washington Department of Fish & Wildlife
https://wdfw.wa.gov/species-habitats/diseases/hair-loss#:~:text=Hair%20loss%20syndrome%20(HLS)%20of,in%20Western%20Washington%20in%201995.