The biggest reason I ask for this is that it seems like the CPU has this option. I've seen the CPU throw the ball away from inside of the pocket all the time, but they do it near a receiver, so it's okay.
However, as a human player, if you try it, it seems like it will always be called intentional grounding as your QB just throws it out of bounds about 5-8 yards down the field regardless of receiver presence.

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