Well, you were the one who brought up making a deal with Washington, so as to avoid the full price tag.
Per B-R.com, Lowe has 4.145 years of service time, so he is below the 5.000 year mark after which he could refuse assignment. But he still can if he has ever been outrighted to the minors before. While I doubt he has, I’m not sure. Although I think Washington will release him and save the pro-rated portion of minimum wage on his salary…