Among those who debuted since 2000, running backs experienced a 25.2% decline in PPR points per game, and 37.0% in total PPR points scored, from their age-28 to age-29 seasons. Only 11 running backs have reached their age-28 and 29 seasons since 2010 and the group saw a 16.8% decline in PPR points per game going from ages 26 to 27, 8.4% decline going from 27 to 28 and a 15.3% decline going from 28 to 29.
In fact, running backs are getting fewer opportunities as they advance toward 30 years old. Last season, only 13.8% of all touches by running backs were accrued by those 28 or older, while 8.4% came from those 29 or older. That's a marked downturn from the 16.4% and 13.7% numbers that were accrued by those same groups 10 seasons earlier (in 2012).