I think the change will be modest, somewhere between $18.9 million and $19.5 million, or just enough to make it difficult to pair Caruthers with Guy Hecker and still have enough cash to keep the rest of your team strong enough to compete.
Also, remember that other changes may result in Caruthers not being quite as effective as he has been.
Personally, I'm hoping for a programming bias that makes it impossible for any player shorter than 5'8" to live up to his R.L. stats...