Casey is 24 and has been lifting since he was like, 7. He has been living at the Olympic Training Center in Colorado Springs for 7 years. There is no such thing as "professional" weightlifters in this country, unfortunately there just isn't a lot of money in this sport. But Casey is pretty much as professional as you can get, Lifting is all he does. He doesn't work, and he finished school- so he just trains.
Regarding him snatching what an 85kg Olympian may snatch, you need to keep in mind that we are probably one of the only countries that are drug tested monthly. Most countries are only tested in competition, and have millions of dollars to pay "nutritionists". So for an American lifter, Casey is as good as they come. He is the best male lifter we have, and earns us the most points internationally.