Was Jake Ever Bound to the Circle?

No but maybe in the 2nd season

They did say after Jake's brother's death that he was bound to the vòng tròn like the rest of them. I dont remember any stand alone magic. I know for a fact that Jake is and always will be till they unbound the vòng tròn that he was bound to the circle.

I can definitely remember stand alone magic, when he uses the witch jars as a witch hunter, and when he went through the ngọn lửa, chữa cháy in the episode ngọn lửa, chữa cháy And Ice. But then they did say he'd be bound, effectively replacing his brother. It made me think he'd be the một giây Blackwell til they revealed that was Diana.