I do not dislike him but he is slow with a weak arm, some thing the Twins cannot afford with their some times ineptitude in the field.
Garlick or Refsnyder are much better, therefore; Larnach should spend a year of time in AAA to see if what you see is all that you will ever get.
A veteran OF with a accurate strong arm would be best but Garlick or Refsnyder look good; I do not see Rooker as any better than Larnach, at this point.