Find a boosting partner, go to Xbox Live, My NBA Live 10 Online, Leaderboards, and then LT to the Friends Tab... Challenge your partner to a ranked game.
You can quit out after the 2:59 mark in the 1st quarter. Repeat 15 times and the achievement pops when you go back to the loading screen for the main menu.
While boosting this, I suggest you also trade off the achievement for 3 wins in a row.