The mission will unlock in the Discoveries tab once you acquire the rookie version of Joe Mauer. Joe Mauer is now live in the weekend promotion packs, standard packs, DD/BR packs and normal gameplay drops. This is our first offering of a new Mission, but we don't intend to stop here. Please expect NEW missions to drop on a regular basis.
Joe Mauer Mission Rookie to Prime:
Discovery - Acquire Rookie Joe Mauer
Complete – Tally 115 hits with Rookie Joe Mauer
Discovery – Complete Mission I
Complete – Evolve Joe Mauer by feeding infielders to your DD player (C,1B,2B,SS,3B)
Discovery – Complete Mission II
Complete – Lock Rookie Joe Mauer to your collection to receive Prime Joe Mauer