Turns out I have to find a cut. I could cut my lowest ranked prospect, but I do have 18 carded position players. I should be fine on PA, so if someone could use Tike Redman or would be willing to take the same flier on Eurubiel Durazo I had planned I'd be happy to make the deal. Looking just for cash, but I suppose a more complex deal that still resulted in net one fewer player to BRK would also work.