There is absolutely no way LeBron scores 1000 points in "each" of the throws. You do realize that 1000 points in SP is 18.4m, discus is 56.2m and javelin is 77.2m.
Bryan Clay holds the decathlon world record in the discus with a throw of 55.87m, therefore LeBron would have to break a world record to do this. You are out of your mind if you think this can be done A) easily B) after training for only a year.
I see it going more like this:
100m- 10.85 (894) LeBron is an explosive freak and is 6'7". If he can be taught how to block start and accelerate through the first 40m of the race his stride length and frequency will be enough to take him the rest of the way.
LJ- 7.60m/~25' (960) LeBron is used to converting horizontal speed into vertical jumping ability. Ever seen him take off from the free throw line and dunk? Enough said.
SP- 16.3m (870) Given that at least one collegiate decathlete throws over 16m annually and they are much smaller/less explosive I can see LeBron, with just average technique throwing pretty well.
HJ- 2.13m/~7' (925) For the same reason as the long jump he will be good at this event. Converting speed to vertical jumping ability will come natural for him. I bet he clears it in a cannonball over the bar.
400m- 52.0 (725) This will be a challenge for someone who has never felt this type of pain or ran this distance. With the right coaching and a years worth of training, his strength and athleticism will serve him well, but 400m is a long way for 260lbs to move.
110h- 15.5 (790) If he has even an ounce of flexibility in him he will have no problem getting over the hurdles since he is 6'7". Even with poor technique he is strong enough to 3 step between hurdles and fast enough to run a decent time.
DT- 50m (870) This event will come natural to him. He's used to spinning and pivoting on one foot from playing basketball. His wingspan and strength will make this baby fly. Anything over 50m will require some serious technique which he won't have the time to perfect.
PV- 4.45m/~14'6" (746) Just let him cap a 16' pole, tell him to run fast, jump, and hang on.
JT- 55m (663) This event is a struggle for most pro decathletes as it is. This is a motion he rarely does as an NBA player. His strength and wingspan will help him here.
1500m- 5:15 (476) Yes he is in great physical shape, but basketball shape and running shape are two very different things. Lets not forget he is purely an explosive athlete and he weighs 260lbs, this will be a struggle.
LeBron Total: 7919
Clay PR: 8832
I would only bet on LeBron if he was getting 1000.