The jersey being a 1990 jersey is, in and of itself, not automatically a disqualifier, as the Twins have been a budget-conscious team for decades, and it's not out of the question that they may have brought out an older jersey for Morris to wear in the 1991 WS. However, your photo research definitely confirms that it was not the one he wore in his one road start in that series. Nice work on carrying the research to the highest level of proof.

Dave Miedema