It looks like Kendall Marshall will not be helping you shoot with him in NBA 2K14. The reason is he has a hard enough time shooting in real life according to him on Twitter:
stop askin me how to shoot with me in 2K, I don’t know. I’m still tryin to figure it out in real life. lls
— Kendall Marshall (@KButter5) January 28, 2014
I’d say it’s cold blooded but he said it about himself.