I need to see Buxton healthy before I worry about any of this.
But assuming he is, space isnt an issue. Gray is an obvious roster move, and Roden is an easy one too.
Finding ABs for hitters is pretty easy. The problem is finding hitters. If they do call up Jenkins, and Buxton is on the roster, Larnach can get ABs at DH. As can Buxton some days, for that matter. Keaschall isnt someone that needs to be in the lineup every day either.
And there's always the chance someone ELSE is injured.
Jenkins up and hitting would be a nice problem.
Not a guarantee he'll hit, of course.