I haven't yet, but they aren't really considered multi position since you're still training them at the fastest rate possible.
Tory Baynham (35491742)
Center
Age: 19
Height: 6'6" / 198 cm
Potential: MVP
Jump Shot: mediocre Jump Range: mediocre
Outside Def.: proficient ↑ Handling: respectable
Driving: average Passing: awful
Inside Shot: strong Inside Def: proficient
Rebounding: respectable Shot Blocking: respectable
This guy started with 7 OD, IS and ID, but had to spend to best part of last season training 1 on 1 (started with 1 driving). My plan from here is to hammer him with OD and IS which will still train his ID until the end of the season. Next season will depend if he's going to make the u/21s, but my choice would be passing and rebounding.
I have decided that JS is the skill he is going to always be playing catch up with (started on 2), but if I get his other skills up early, I can play him in position for a long time and let it build up, as opposed to playing him out of position later on. JS is one of the more expensive skills, so it will make him more salary efficient as well. He probably won't be the best SF ever seen (he only started with 47 tsp), but with a bit of luck with injuries, he will be good enough for me to build a quality team around in 7 or 8 seasons.