This was on the SW couloir route and I'm guessing this rock slide was in the gully below the big slab. That talus is extremely loose. If anyone has better details, please post. I'm just happy the 2 climbers are recovering and wish them the best.
http://billingsgazette.com/news/state-and-regional/montana/injured-hikers-rescued-taken-to-billings/article_ae044ad7-9177-5adf-a8f1-c58a0d6cb6f5.html