Whiting True Green?
https://www.mcmurrayhatchery.com/whiting_true_green.html
The text says, "Mature birds range from reddish to chesnut in color, have a single comb, yellow legs"
Looking at McMurray's photos, I see the red feathers, yellow legs, and single combs. Some have black in the tail and...
Which hatchery?
I notice he's got yellow legs with no feathers on them, white earlobes, and I think that's a single comb. Can't tell whether he's got a small crest or no crest.
I agree with oldhenlikesdogs that a picture from the side would help, too.