I also suspect that the three guys I mentioned--Rollins, Byrd and Victorino--may be holding out for starting jobs (or the possibility thereof) and not yet willing to accept part-time roles as utility middle infielders (in the case of Rollins) and fourth or fifth outfielders (in the case of Byrd and Victorino).
As for Brown, if Boras is holding him out for a ML starting job, he's losing his mind.