Very common. I'm a middle-aged doughy IT sysadmin and I can deadlift 565 from the floor. Never touched a drug in my life. I just look like a regular chubby dude. Any reasonable age, average sized, injury-free male can deadlift over 400 within a year, IMO, just for comparison. 545 off of blocks is achievable for just about any average dude with a few years of training. I think I hit 545 after 3 years of training (from the floor mind you, doing partials from blocks is much easier than pulling from the floor).
Young, 230lb genetic freak? And only pulling 545 from blocks? That's honestly not impressive at all. Especially when he has tested hot and clearly at least has used anabolics, if not currently using them now. He's also done 600lbs before with a sumo deadlift from the floor, probably on more drugs back then (or just more powerlifting training....or both):
Dope