After four injury-riddled seasons at Notre Dame, the most recent of which was her healthiest and most productive, rising graduate senior center Nat Marshall is entering the transfer portal. She announced the news Wednesday night on her Instagram account. “Attending@notredamehas been one of my life’s greatest joys,” Marshall wrote. “Words can’t describe how thankful I am for @ndwbb, @irishcoachivey, our support staff, our fans, and everyone who has touched our program over the last four years. The genuine love and support I’ve received during my time as a student-athlete is something I hold so …