from the 1940's?
I'm a Dodger fan, so that probably invalidates my opinion in your eyes, but you do realize that MLB now tracks stats that weren't found on the back of a 1981 Fleer baseball card?
Hits per 9 innings, walks per 9 innings K/BB ratio, Wins above replacement...........Greinke is better than Arrieta in every single category. But yup, Arrieta has wins.......so you really owned Jope, I guess.
http://www.baseball-reference.com/leagues/MLB/2015-pitching-leaders.shtml