Ya beat me to it Smitty! I was just looking at that, the problem for Miami is that they would need to send out more than just McRoberts in any trade to make it work under the cap. Realistically they would have to either;
1) Use Dragic as the key piece in the trade which seems unlikely
2) Also send out Winslow. That would be a very win now move by Miami that also seems unlikely
We'd only be necessary in scenario 2 and even then I don't think they'd need us as I'm sure Sac would love to acquire Winslow for themselves. However we could send out a package of Mickey, Young and the non-guaranteed contract of Holland to nab Winslow. We'd need to take on Weber to make salaries work for Miami in that scenario, McRoberts would go to Sac.
It doesn't sound realistic though. I imagine Miami would be a landing place for him around January when the newly signed guys become trade chips. Something based around T. Johnson would make more sense for Miami and Sac. It just depends on whether Sac would wait that long