Fresno State was the only team to go through the Judi Garman Classic in Fullerton, CA without losing a game. En route, the Bulldogs handed two teams, Michigan and Long Beach State, their only losses of the tournament. No. 1 Arizona State (with a loss to Florida State) and San Diego State (with a loss to the Wolverines) also finished with one loss each (for further details, go to the tournament website and then scroll down when the page comes up).
A round-up of this weekend's SEC play through Saturday (there was only a limited amount of non-conference action on Easter Sunday) is available here.
After the first weekend of Big 12 play, four teams are undefeated in the conference: Texas A&M (3-0), Missouri (2-0), Oklahoma (2-0), and Texas (2-0). For further information, see the official Big 12 conference page via the links in the right-hand column.
Friday night in Lubbock, Texas Tech appeared on the verge of upsetting #7/9 Texas A&M, leading 3-0. However, A&M rallied in the late innings of regulation to tie the game, then broke out for 4 runs in the 9th, eventually winning 7-3.