Hmm...Where to start with this one?
Ok first of all, I must point out that he has no nipples. (which is fairly funny) Now for the serious part...His arms ARE too long whether you think they are or not (unless your trying to draw a graalian basketball player whos height is like 300 pixels height-wise. Also as for his shoulders...For the front view you wouldnt be able to see the underside of his arm (armpit), it would just come to a crease in between the pecs and the shoulder. And two last things for the front view, please tell me why his tricep is drawing infront of his bicep? The inner muscle should be alot bigger (bicep) and muscle towards the back of the arm (tricep) should pertrude outwards instead of actually being in front, Also why am I getting the illusion that when he makes a fist his pointer finger is being drawing infront of his thumb..? Well anyways...thats all I can spot for now.
Have fun and I hope all turns out well.