The Twins now have what, six pitchers age 25 or older slated for AAA (Oliveros, Tonkin, Hamburger, Achter, Pressly, Meyer) - seven if May is optioned?
With all except Hamburger on the 40-man roster too.
If we expand the list, we have recent hard thrower Pryor, plus possibly Thompson & Thielbar, and Darnell the starter too. All 25 or above, all currently on the 40-man roster.
Admittedly a couple should be dropped from the roster in the next week, but if the goal was to sort through them at spring training before thinning the herd and establishing a good depth chart, it should be noted that the youngest and probably highest upside of this group were also the first to be optioned out of big league camp. Hamburger, Thompson, and Thielbar, all age 28 with past MLB experience, are the only three in this group to even last into the last two weeks of spring training (excepting May who's starting, of course).