I just posted the correct numbers on the Game Time Forum. You're close. It's 32-0 after tonight.
2017
Games won when Rams were ahead at the half - 9
Games lost when Rams were ahead at the half - 0
Games won when Rams were not ahead at the half - 2
Games lost when Rams were not ahead at the half - 5
2018
Games won when Rams were ahead at the half - 10
Games lost when Rams were ahead at the half - 0
Games won when Rams were not ahead at the half - 3
Games lost when Rams were not ahead at the half - 3
2019
Games won when Rams were ahead at the half - 8
Games lost when Rams were ahead at the half - 0
Games won when Rams were not ahead at the half - 1
Games lost when Rams were not ahead at the half - 7
2020
Games won when Rams were ahead at the half - 5
Games lost when Rams were ahead at the half - 0
Games won when Rams were not ahead at the half - 1
Games lost when Rams were not ahead at the half – 3
Total Halftime data for Rams games under McVay (2017-Present) – 57 games
Games won when Rams were ahead at the half – 32 (39 total games WON)
Games won when Rams were not ahead at the half – 7 (5 were on the road)
Games lost when Rams were ahead at the half - 0
Games lost when Rams were not ahead at the half – 18 (18 total games LOST)