That would be dumb., for a couple reasons
1) While it should be a fixable problem, Contreras habitually crouches too close to hitters. While this leads to too many catcher interference calls, the real issue is safety. A couple seasons ago, this poor habit lead to Contreras’ left arm being struck by the swing of JD Martínez, resulting in a broken arm.
2) Last year, St. Louis carried 3 catchers for the bulk of the season (Ivan Herrera, Pedro Pages, Yohel Pozo), all of whom were better defensively than Contreras. They did use Herrera at DH a lot, but they would be better off simply getting a better DH and letting Herrera get back behind the plate more often. Why Contreras was not a candidate for DH is another level of mystery here…