https://calltothepen.com/2011/01/13/...latoon-splits/ A little old but gives a good example of how extreme irl platoon splits can be from a hitter's perspective.
I don't care about pitch types/velocity/arm slot re: platoon splits, I just care about the ratings (or go by career splits where possible if doing a stats only league).
I tend to be very extreme with my platoons, especially amongst my relief pitchers and try to employ 2-3 LHP and 2-3 RHP.
One example for me was RP Jake McGee with Colorado 2017-2019 (LHP with 99 Stuff vs. LHB, 90 Stuff vs. RHB).
LHP he had a 3.95 ERA with 23 HRA and 35 BB vs. 152 K in 118.1 IP (2.67 BB/9, 11.58 K/9) and a 124 ERA+
RHP he had a 4.12 ERA with 26 HRA and 43 BB vs. 153 K in 126.2 IP (3.07 BB/9, 10.91 K/9) and a 119 ERA+
A more extreme example was Rayan Gonzalez (RHP) with a 68 Stuff vs. LHB and 83 Stuff vs. RHB.
2019 Season
- vs. LHB: 4.88 ERA in 31.1 IP with 3 HRA and 22 BB vs. 31 K (95 ERA+)
- vs. RHB: 2.86 ERA in 28.1 IP with 2 HRA and 16 BB vs. 36 K (163 ERA+)