sounds like a cocker alright!..
While they do all love to jump about and it is all part of puppyhood, I would try to prevent him jumping from too great a height if and when you can (easier said than done, I know!) to avoid risk of overstraining the joints etc. Its a good idea to curb him jumping up and off furniture anyway, although sweet and endearing now, you probably won't want him doing it when he's about 14 kilos.
. You could perhaps try and keep him stimulated with more placid activities in the house, searching for treats, toys etc, training obedience or tricks and keep the energetic stuff for outside, but even then, its probably best not to encourage too much jumping and leaping about until he's a little older.