Only way you can get RDLR up here right now is by DL. He was optioned on Sunday, which means he's only missed 5 days. Once you're optioned, you have to be down 10 days before being called back up unless there is a DL situation.
Not sure something isn't physically wrong with Bailey, anyway. Look at his numbers post-DL stint.
Pre DL: 1.46 ERA, Opponents hitting .140/.213/.256, 20 K, 4 BB in 12.1 IP.
Post DL: 7.20 ERA, Opposnents hitting .316/.422/.737, 10 K, 7 BB in 10 IP.
So in 2.1 fewer innings, his K numbers have been cut in half, his BB numbers have doubled, and his avg, obp, and slg numbers have all doubled or close to tripled (SLG).
I don't think this is a case of him being able to fix it in low leverage situations. There's another underlying factor here.