Just to weigh in on the Freddy debate from earlier in the thread, I’ve always thought the best “quick and dirty” classification system for starting pitchers was…
5.0+ WAR = ACE
4 to 5 WAR = #1
3 to 4 WAR = #2
2 to 3 WAR = #3
1 to 2 WAR = #4
Using that breakdown and sorting by rWAR, among 117 SP with at least 100 IP in 2023 there were six ACE, fifteen #1, twenty one #2, twenty seven #3, twenty five #4, and then everybody else is essentially in the fungible fifth (or sixth) spot.
For more of a rate stat breakdown I’d go something like…
69 ERA- or lower = ACE
70 to 80 ERA- = #1
80 to 90 ERA- = #2
90 to 100 ERA- = #3
100 to 110 ERA- = #4
Applying that criteria to the same 117 SP with at least 100 IP in 2023 comes out to five ACE, fourteen #1, twenty seven #2, twenty three #3, and thirty #4.