Back in 2017, when Sean McVay first took over the Los Angeles Rams, the running backs getting the reps were big men. Todd Gurley and then CJ Anderson were backed up by Malcom Brown, all 225+ lb. In 2020, the trend towards smaller backs began and with few exceptions, carries on to this day.
Darrell Henderson started it and was quickly followed by Xavier Jones, Raymond Calais, and Mekhi Sargent. In the Super Bowl winning 2021 season, L.A. did step up with Sony Michel (lasted only that season) at 215 lb. and was soon followed in 2022 by Cam Akers at 217.