Astros, Mariners, Brewers, Pirates, Red Sox, Twins, Cubs, Padres
Can probably rule out the Brewers and Pirates for financial reasons. Cubs are fringe contenders now so maybe not them. Red Sox, depends on Casas' medicals and that's an in-division trade so not likely at all. Twins have depth on offense so probably not them.
Astros, Mariners, Padres.