We were looking forward to seeing him try to compete against everyone on equal footing as indoors in the DMR he was fresh and nearly everyone else wasn't, but Callahan won't be declaring as he has been scratched.
You can review the declarations yourself and basically figure it out who is getting in by counting down to #48 in each event that's not a scratch( barring any errors).
See the links below.
http://rtspt.com/ncaa/d1outdoor13/west_w_review.htm
http://rtspt.com/ncaa/d1outdoor13/east_m_review.htm
http://rtspt.com/ncaa/d1outdoor13/east_w_review.htm
http://rtspt.com/ncaa/d1outdoor13/west_m_review.htm
If my counting is correct, it looks like the men's 1,500 in the East will go down all the way to #76 Silas Talbot of Dartmouth at 3:47.35.