The Yankees have demoted Melky Cabrera, waived RIchie Sexson, and promoted Brett Gardner and Cody Ransom. I'm going to ignore the Melky/Gardner swap and focus on the Sexson/Ransom swap.
Sexson was brought in to hit lefties. He's done so, with an OPS over .800 against lefties as a Yankee, but they waived him to make room for Cody Ransom. Ignoring the fact that I wasn't aware he was still in the majors Ransom has a MLE translated OPS against lefties or .745. Obviously he may outhit that, but Sexson was doing exactly what they wanted and still gets cut.
This isn't quite 30+ waivers claims, but I'm not sure what could potentially be gained from this swap.