Jack Morris was a great, dominate, and very competitive pitcher. He won 254 games and lost 186. He pitched 3,824 innings and struck out 2478. Furthermore, Morris pitched at a time when he expected to pitch the whole game, therefore he had to manage his performance to allow him to do this. If he pitched today, he would only pitch six innings and his WHIP would be better.
Murray Chass has a very good discussion of this issue here that you should read.
I admired Morris for his competitiveness as shown in his ten inning victory in game seven in 1991. It was the best pitched game I have seen and it shows that he was a true Alpha player, who leads teams and beats others when it has to be done. He is deserving of this recognition.