The easiest and fastest route to unlock this achievement is with a second controller simply make sure that player two selects passing plays while controller one select either a defensive end or a cornerback. After hiking the ball move the quarterback towards the selected player to get sacked. As the achievement mentions this is not a total team sack but rather with one player. If you need ideas of who to use I recommend the Miami Dolphins (Jason Taylor 98 overall) if the rosters are not updated because he has since been traded to the Washington Redskins. This will also help you acquire the 6 rushing touchdowns with the Dolphins in the same game. If you do not have a second controller this is a bit trickier. I recommend before starting changing your settings to rookie by pressing X for advanced options in the play now screens. Another very easy way to unlock the achievement is by modifying the "offside rule" in the settings. This will permit you to start right beside the quarterback and sack em every single time without a miss.