@ Newguy
Regarding the central defender, then he looks really good. I would say that he still lacks some elements to his game before he could be considered first choice in the start 11. First of all - he can play both left back and central defender, and with the current attributes he actually looks a bit more as a left back to me - although his accelleration and pace are poor, he has decent/good marking, tackling, anticipation, concentration, positioning and stamnia. If you want to train him as a full back I would focus on his quickness. If you want to train him as a central defender then then I would like to see more strength, and Decisions - moreover, he has a low team work, first touch and passing - with all that said - the lad is only 16 years old, so use him as a rotation player and/or against lesser opponents - compared to for example Kryriakos Papadopoulos, I would say he has a long way to go before he can outshine KP. Just by playing him as a rotation player for a couple of seasons would see a lot of his mental attributes increase significantly.
Regarding the left back - Kevin Speight, I am a bit more impressed. He is also 19 years old so have had a bit more time to develop. Great marking, tackling, acceleration, pace, positioning. I would have liked to see a bit more flair, but you can't train that since it is a mental attribute. But if you just plan to play him as a full back rather than a wing back you don't need that much flair. The same goes for anticpation and decisions - although those values of 12 and 13 are not poor. I would focus on training his passing, crossing and off the ball. Based on his current values, I would say that Kevin is ready to play a lot of first team football, and if his passing, crossing and off the ball increases, I would say you have a real world class Full back.