It’s neither a leghorn or a welsummer. Defiantly not a leghorn because it lacks white earlobes, plus kinda has wrong colors. It’s colors are off to be a welsummer as well.
It could be an easier egger because they vary so much but still I’m doubtful on that.
Where did you get him?
Edit: this bird in my avatar is a light brown leghorn rooster.
It was hatched in a friend’s daughters classroom. Our broody hen adopted the 6 of them. Still trying to figure out the breeds. I guess we got 5 Roos out of the bunch. I think the others are 3 BCM (one being the pullet), a gray EE, and a barred rock