The complete staff for both teams:
Cy Young, 1901
Rube Waddell, 1904
Christy Mathewson, 1908
Walter Johnson, 1913
Lefty Grove, 1936
Warren Spahn, 1947
Steve Carlton, 1972
Tom Seaver, 1973
Jim Palmer, 1975
Goose Gossage, 1977
Lee Smith, 1988
John Franco, 1988
Greg Maddux, 1992
Mo Rivera, 1996
Pedro Martinez, 2000
Clayton Kershaw, 2013
And for good measure, four inning eaters from the deadball era: Pud Galvin, 1883, Old Hoss Radbourne, 1884, Ed Morris, 1885, and Toad Ramsey, 1886. Those four alone are good for about 2,500 innings. I tried to have a range of lefties / righties, a few relief specialists, and it leans toward pitchers I have watched, or ones I have enjoyed playing in OOTP over many years. Pedro is the unquestioned ace for both teams, year after year, getting all but one of the test season opening day assignments (Toad Ramsey wtf?



).
I've played about a dozen trial seasons and these staffs survive against both Gwynn and Ruth. Team ERA tends to run between 6.50 and 15.00.
So now, just the brackets.