Sam Young is a big two who can muscle big two guards like Kobe Bryant. That is his main value as an NBA player. His ability to matchup physically against big two guards. A good defender/rebounder but not an elite one.
Against small forwards with legitimate size and talent, Sam Young is undersized (6-6, 220lbs) and is a poor defender / rebounder. And he isn't good enough offensively to make up for it. Too limited. Against less offensively capable small forwards, Young can be a passable option at SF. So not really an option to throw against somebody like LeBron.
Offensively, Young has a decent two point jump shot but lacks further range. That is the main drawback in his game. He can finish reasonably around the rim and he can post up against smaller players.
I consider Sam Young a middle of the pack to slightly below average backup two guard. Or a well below average backup SF. An excellent third string 2/3 which is probably the role he'll see most often due to his limitations as jump-shooter but in the right situation he can play more minutes. A big physical two guard who can play a small bit of time at small forward also.