Nothing more or nothing less than a run-of-mill signing that every team in the major leagues does numerous times very year.
I will note that Melvin has caught lightening in a bottle a few times with these moves. Now that lightening has often crashed and burned but there has been some very nice seasons squeezed out of these type of signings. See Casey McG, Axman, and T-Blow. Doug Davis from the old Melvin days.