Some characters and teams to focus on at the Penn Relays:

Jeremy Wariner: USA's 400-meter Olympic champ brings his sunglasses to his first Penn Relays.

Tyson Gay: USA sprinter won three golds at last year's world championships.

Allyson Felix: USA sprinter won triple gold at last year's world championships.

Marcus O'Sullivan's men: "I have my best team in my 10 years here," said the Villanova coach. "We have enough guys to compete in the 4 by 8, the distance medley. We have the Tully twins [Dan and Sean], Mark Korich from Springfeld [Township], Bobby Curtis, Michael Kerrigan, Carl Mackenzie . . . I'm blessed that I have a team that can compete. I'm having a great time, but it will be a handful going up against great teams like Texas. You have to be vigilant no matter how good your team is."

Texas: Coach Bubba Thornton's powerful squad, led by senior Leonel Manzano, will attempt to triple in the 4 by mile, distance medley and 4 x 8.

LSU women: The 4 x 400 women's team of Brooklynn Morris, Nichiesha Wilson, West Catholic alum LaTavia Thomas and Deonna Lawrence is fresh off an easy win in the Texas Relays.

LSU men: The 4 x 100 team of Armanti Hayes, Richard Thompson, Gabriel Mvumuvre and Trindon Holliday ran a 38.74 at the Texas Relays, the fastest collegiate time this year.

Richard Thompson: The Trinidad native from LSU has run a 10 flat in the 100.

Walter Dix: The Florida State speedster took home three golds at last season's NCAA championships.

Penn women: Coach Gwen Harris' squad is expected to challenge in the sprint medley with a team of Kelly Allred, Laura McDaniel, Shaunee Morgan and Jesse Carlin.

Nicole Leach: The UCLA hurdler from Philly will not be hurdling. Coach Jeanette Bolden instead is running the West Catholic graduate in the 4 x 100 and 4 x 400.

Juanita Broaddus: The William Penn High graduate will compete for LSU in the 4 x 100.

Karen Shump: Shot putter from Penncrest High threw it 52-4 in the indoor season.

Chelsey Sveinsson: , Greenhill High (Texas) freshman has run 4:49.37 in the mile.

Nicholas Vena: The freshman shot putter from Morristown (N.J.) High has thrown it an absurd 66-7 1/4.

Ryann Krais: The defending Relays 400-hurdles champ is also running in the 4 x 400.

La Salle and Archbishop Ryan: Two Philly high schools seeded first and third, respectively, battle it out in the DMR. The La Salle foursome won the state indoor championship last month and includes junior Pat Donnelly and seniors Anthony Kent, Brian Ledder and Dan Lowry. The Ryan team won the National Scholastic Indoor Track Championship and includes seniors Sean Mallon and Kevin Myslinski and juniors Phil Celona and Kieran Hennessy.

Yohan Blake: The St. Jago flash holds the Jamaica junior national record in the 100.

Keiron Stewart: Kingston College (Jamaica) is the class of the boys 400-hurdle field.

- Drew McQuade