I've read a number of comments from forum members that wonder why Jake's performance is considered supporting and not co-lead. I don't of any objective criteria, but I DO know that the nomination of 2 actors/actresses from the same film for the same award is usually a recipe for disaster. I looked at a site that shows Oscar winners going back to the time of the dinosaurs, and I found these examples:
In 1950, both Bette Davis and Anne Baxter were nominated for Best Actress for All About Eve - neither won.
For the SAME FILM, Celeste Holm (who, incidentally, is still alive!) and Thelma Ritter were nominated for Best Supporting Actress - neither won
In 1953, Montgomery Clift and Burt Lancaster were nominated for Best Actor for From Here To Eternity - AGAIN, neither won!
In 1954, Rod Steiger, Karl Malden and Lee J. Cobb were ALL 3 nominated for Best Supporting Actor for On The Waterfront - AND NONE OF THEM WON!
In 1961, Jackie Gleason and George C. Scott were both nominated for The Hustler - NEITHER WON!
Hmmm...I am seeing a pattern! The point is, awards-wise, Jake is better of being categorized in the supporting role. Besides, who would want to pit our boys against one another - unless it was for another ruff-and-tumble love scene!

Comments?