Derrick Henry is coming off of a 2,000+ yard season. That's a huge season and will likely stand as the best season of his career. Why? Let's take a look at every other previous 2,000 yards rusher and what the season after their 2,000 yard season looked like.
1973 O.J. Simpson. 2,003 Yards. - in 14 games.
1974 O.J. Simpson. 1,125 Yards.
Not much changed for Simpson from one year to the next, he wasn't as efficient and didn't get as many carries. The few years after he did well again though.