ESPN.com profiles Tennessee's pitching sisters , Ellen and Ivy Renfroe.

Play began yesterday in the Pac 12 conference, highlighted by defending NCAA champion Arizona State's extra-inning win over intrastate rival University of Arizona. In other action, Cal routed Stanford, and Washington defeated new member Utah. Oregon and Oregon State begin a three-game series today. With the conference now having nine softball-playing members, UCLA was the odd team out this weekend and is facing non-conference opposition. Longtime members USC and Washington State do not field softball teams, nor does newcomer Colorado. Another conference in transition is the Big 12, which has already lost Colorado and (softball-playing) Nebraska and has Missouri and Texas A&M leaving next season for the SEC. The Tigers and Aggies are actually playing each other this weekend, with A&M having taken yesterday's opener .

No. 1 Alabama split a doubleheader with Tennessee yesterday, marking the Tide's first loss of the season.

Top-ranked and undefeated Alabama hosts No. 12 Tennessee for a doubleheader tonight. It appears that video and radio streams will be available. Click here for further information.

The bulk of the action in the annual Judi Garman Classic in Fullerton, California gets underway today. The top teams in the tournament appear to be Washington, Oklahoma, and Arizona State. Conference play is underway in the SEC. Beginning Friday, No. 1/2 Alabama plays Ole Miss in a weekend series. California, also with 1 and 2 rankings in the national polls, travels to Hawai'i for a tough tournament. The Golden Bears will face the host Rainbow Wahine in a battle of undefeated squads. Also, Cal will take on Texas (19-1).

There is no major tournament this weekend attracting a large number of the nation's top-ranked teams. Instead, there are a lot of smaller tournaments. One match-up that has great personal interest for me is UCLA vs. Michigan in the Disney/Wide World of Sports tournament in Lake Buena Vista, Florida. The Bruins and Wolverines are just getting underway now, late Friday afternoon. UCLA is where I received my bachelor's degree and Michigan, where I obtained my Ph.D. Both teams currently are ranked in the mid-teens nationally, a far cry from 2005 when UCLA and Michigan played a classic three-game final round in the Women's College World Series (won by the Wolverines, thanks to Samantha Findlay's three-run blast in the top of the 10th inning of Game 3).