its pot... he's 17... this would not be a big deal at all if he weren't a football player
as for the intent to deal, I'm not sure how the law is on your side but in the states, certain quantities get you automatically charged with intent to sell, even if you just planned on smoking a big amount with your buddies.
many professional athletes drink, his drug of choice just happens to be illegal (and slightly better for you)
as for the issue of him not breaking into the first team despite supposedly having rooney's talent, rodwell and rooney are both large for their age. they're as big as grown men, baxter isn't yet. there are many players that stood out at youth levels because they towered over the others, but once everyone did some catch-up growing, they're suddenly revealed to be very average. hopefully baxter will be the opposite.