there was some discussion here somewhere about what makes a staff ace, a #2, a #5 etc starter. someone over at redlegnation.com did a sort of confusing/sort of interestind analysis of this very same topic. He took the approach of defining the slots by averages, which i know not everyone aggrees with. Check it out if you're interested, here's what came out of it:
The breakdown was by ERA and split by league.
AL #1 SP < = 3.61
AL #2 SP 3.62 - 4.06
AL #3 SP 4.07 - 4.57
AL #4 SP 4.58 - 5.78
AL #5 SP >= 5.79
NL #1 SP < = 3.50
NL #2 SP 3.51 - 4.05
NL #3 SP 4.06 - 4.48
NL #4 SP 4.49 - 5.09
NL #5 SP >= 5.10
here's how the reds break down:
NL #2
AHarang 3.83
NL #3
BClaussen 4.21
DWilliams 4.41
NL #5
MBelisle (as a starter) 5.25
EMilton 6.47
LHudson 7.20
PWilson 7.77
ERamirez 9.31
My feeling is that you can define the #2-#5 spots, but that it doesn't work as well for the "ace" idea. An average #1 starter maybe, but not an "ace." not everyone who put's up an ERA below3.61 is an ace in my mind, but that's for another discussion.
I generally agree with the reds breakdown. harang is a solid #2, claussen and williams are pretty solid #3s. If we can pick up another #2 through a trade, and got some bounce back from milton or wilson to #3 or at least #4 form, we'd have a competent rotation.