A football thing I didn't know

I knew a lot of NFL teams are moving to a two running back system but I was not aware teams limited their running backs' carries like they do with pitchers and pitch counts. Below is a quote from an article on the soon-to-be-expanded NFL season and how it will effect regular season records. I'm not a fan of expanding the NFL season. I like it right where it is. I think this will bring down the level of play.

"From afar, it appears two extra games could put Eric Dickerson’s mark of 2,105 in jeopardy, but it’s highly unlikely. Like pitch counts in baseball, teams monitor the number of carries for running backs, and because of the brutal nature of the position, that carry count isn’t likely to rise exponentially. Instead, teams will just increase the workload of No. 2 running backs.

To get near the 2,000-yard mark, most NFL running backs would have to rush in the neighborhood of 400 times in a season. But many teams now try to keep their primary back below 350 carries in a regular season in hopes of extending their careers. Why? Because they’ve seen the damage a “super” season can do.

Jamal Lewis has never been the same since he rushed the ball 387 times for 2,066 yards in 2003. Terrell Davis’ career essentially ended with his 392-carry season in 1998. Shaun Alexander’s career plummeted after his 370 carries in 2005. In essence, any back hoping to push Dickerson’s record would likely have to do it in the fashion Barry Sanders did in 1997, when he averaged 6.1 yards per carry on 335 rushing attempts."