Before we get into this, I'm aware people have a lot of mixed feelings about the abilities in Madden 25 Ultimate Team. I get that. I prefer to win because I played well, not because I paid more coins for an overpriced player. That said, coaches in the actual NFL go out of their way to get the most talented players. I don't know who discovered this combo initially, but I heard it first from ZanMadden on YouTube.
The ability Sideline Deadeye grants your player the ability to throw perfect passes on all throws outside the numbers, except high/low throws. The ability Inside Deadeye does the same thing inside the numbers. Obviously, your receiver will always be in one of those positions. So the stack gives your QB perfect passing on every throw.
There are a few caveats here. Wide receivers sometimes drop wide open passes in Madden, just as they do in real life. They're also still vulnerable to hit sticks, or just good old fashioned unforced fumbles.
And "perfect passing" does not mean you can't be intercepted. Believe me, I learned the hard way. The game will recognize any defenders near you, and their attributes and abilities will come into play too. The Switch Stick also exists, giving DBs chances to make plays they wouldn't have been able to in previous years.
But on the passes where your receiver is open for a brief moment, and you need a tight spiral? This combo is the truth. I had a 500-yard game today with an 88 overall Michael Penix, who happened to be the only QB on my roster who had both abilities.
Also, you don't have to be in the pocket to nail these perfect throws. These two abilities only check where the receiver is, not the quarterback. Your player can be running for his life and still hit these throws because it's the receiver's location that matters here.
Now I direct you to one of the best sites in all the Madden community, MUT.GG. Here you can search quarterbacks by ability and find which signal callers you'd like to invest in that have the combo.