A little rotation maybe?

[Chris Weekly]

This affected at least 8 joists...and the living room floor showed it.

[Gunnar Alquist]

This affected at least 8 joists...and the living room floor showed it.

Nice find Chris.

[Markus Keller]

Great job on going in the crawl and finding that.
There are a lot of guys who won't even go in a crawl. Thats a doable but costly repair.
Its ok though. They'll just screw a chunk of 2x4 underneath each joist with 3" drywall screws.
No problem, I fix.

[Chris Weekly]

Kind of a easy fix to re-support the joist ends (or he could go all out and jack up the joists to level), with the 2 x 4 nailed to the cripple wall. The cause of it all, though, might be a different story with fixing the rotation. Poor drainage around the perimeter, cracks in the foundation, and rotation - shown in the photo.