For this achievement, your quarterback must gain atleast 5084 passing yards.
It is best to use a gold star quarterback, like Joe Montana, with a gold star wide receiver, like Jerry Rice. You can also make some of your silver and bronze star players wide receivers, tight ends, and linemen that specialize in pass blocking. When creating the rest of your team, make your linemen be pass blockers.
When in the season mode, go to your gameplan and turn the passing slider up, thus making the running slider lower. When simming, this will make your offense pass more often than run.
You can also turn all of the in-game sliders in your favor.
Now, you can either play the games or sim. If you sim, make sure that you only sim 15 games. After simming those 15 games, look at your stats to see how many more passing yards you need until you get the achievement. If the total is above 5084, just turn the quarters down to 1 minute and finish the game. If you are below 5084, either start a new season or play the last game with the quarter length set to however long you think you need. On average, you can get about 200 yards per 5 minutes even if you're not good at the game. Upon finishing the game, you should receive the achievement if you got enough yards.
Alternate Strategy:
Follow all of the above steps except for the final paragraph. Sim one game at a time. You need to average between 318-339 yards. Sim 15 games and then play the final game in order to get the rest of the yards that you need.