In Online Dynasty, write a comment on a Dynasty Wire story.

Go to Dynasty, then Join Online Dynasty. When the search menu comes up, just look for something that isnt private, and everything else as any. Join the dynasty. You dont have to create a coach. Select any available team. Once you get to the dynasty menu, select recent news click on an article, then hit A to post a comment. Once you submit it the achievement will unlock. Feel free to leave the dynasty afterwards by backing out and then selecting RB to retire from the league.

Online note: EA is notorious for shutting down servers, if you have this game Id recommend unlocking this achievement ASAP in order to ensure youre not locked out of it.