This looks good, you've got everything in the right place and the muscles are the right shapes. I did notice a couple of things so I did a quick draw over.
There's a small gap on the collar bone between the pecs and the delts (in green). And on the back, there are the three muscles over the shoulder blade. The top one is the largest(blue), the one on the bottom next (cyan), and the one in the middle (green) is the smallest. And the bottom muscle kind of starts under the lats and moves over the lats as it connects to the arm.
Overall this looks really good and those two areas are things that I've had trouble with in the past, those small back muscles, in particular, are difficult. Your orc sculpt looks good, I really like his eye scar, that looks really cool