Fellas, I will try my best and give you the benefit of the doubt.
if you liked it than you should've put a ring on it
It Was Beginning To Get Uncomfortable
This is a very reasonable reason, but it's probably best he deals with the uncomfortableness before the relationship gets just as uncomfortable.
It Was Too Tight
Either his fingers grew or the ring was too small to begin with. You might want to look into that.
It Messes His Basketball Skills Up
Yeah, I can't even vouch for him on this one. Think of a better excuse playboy or just accept the fact that you're no Lebron James.
Oh, that's probably why his ring finger was itching so much a couple weeks ago.