Depends on need - if a few SB can help you, pick up Winn. If not, and you really don't gain anything by using it, then I'd keep it for two reasons:
1) you never know what type of August trades might occur. They seem to be more prevalent over the last couple of year.
2) you never know when another owner will make a stupid drop.
So, if one of the guys changing leagues helps, use it since there's no guarantee that anything more significant will occur. If not, keep it since there's no point wasting it for non-help.