My guy "friend" doesn't respect bro code and goes for the same girl I'm interested in. What's a good way to deal with him?

On multiple occasions a friend of mine will see me talking to a girl out at a bar or a party and come over to say hi, then I'll usually politely introduce him to the girl I'm talking to (because he just stands there trying to insert himself in the convo). From here he will make basic small talk with her, then at some point he'll try to dominate the conversation or talk to her when I've gone to get a drink or the to the bathroom and he'll ask for her number.
Now, technically if a girl is single then she is fair game, but bro code would dictate you don't try take a girl from your friend if he is interested in her first, and you should instead be a wingman for him.
This "friend" of mine doesn't see it that way and instead only thinks about himself and will try his luck at her too.
He tends to see me as an easy way in to meet new girls, as I've done the heavy lifting of meeting new people, now he will just come over as "my friend" and talk to me to meet them.
I've also told him on two occasions that I was interested in the girl so he should back off, and he still went ahead and got their numbers when I wasn't around.
Anyway, I know it's petty but I find it disrespectful and a **** move on his part, and I'm curious if you guys have any strategies or advice in straightening out this guy.


Source.