After tallying 10 wins on day one of the USA College Challenge, the Pac-12 Conference took a 155-141 lead over Team USA at the Uytengsu Aquatics Center on the University of Southern California campus on Saturday night.

After strong performances in Budapest this summer, Katie Ledecky (Bethesda, Md./Stanford University) and Kathleen Baker (Winston-Salem, N.C./California) contributed with individual and relay wins for the Pac-12 Conference.

Ledecky got the Pac-12 on the scoreboard with a victory in the 500-yard freestyle with a time of 4:28.75, while Baker won the 200y back in 1:50.62. Click here for complete results from Los Angeles.

Tom Shields (Huntington Beach, Calif./California Aquatics) led Team USA with wins in both the 100y fly (45.16) and 100y free (42.73). He also contributed to the men’s 400y medley relay first-place finish.

Team USA swept the men’s 200y breast, led by a time of 1:53.42 from Olympian Josh Prenot (Santa Maria, Calif./California Aquatics). National Team members Nic Fink (Morristown, N.J./Athens Bulldog Swim Club) and Cody Miller (Las Vegas, Nev./Badger Swim Club) followed.

Zane Grothe (Boulder City, Nev./Badger Swim Club) rounded out the individual wins for Team USA. He won the 500y free in a time of 4:13.63 and was followed by USA teammate Mitch D’Arrigo (Gainesville, Fla./Gator Swim Club).

Also winning individual races on Saturday for the Pac-12 Conference were Louise Hansson (Helsingborg, Sweden/University of Southern California) in both the women’s 100y fly and 100y free, Patrick Mulcare (Tigard, Ore./University of Southern California) in the men’s 200y back,  Maggie Aroesty (Long Island, N.Y./University of Southern California) in the women’s 200y breast, Andrew Seliskar (McLean, Va./California) in the men’s 400y IM and Ella Eastin (Irvine, Calif./Stanford University) in the women’s 400y IM.

“I wasn’t surprised when we were going into the last relays with a tie,” Lia Neal (Brooklyn, N.Y./Stanford Swimming). “That just makes it really interesting and a really cool spectacle, just attention and entertainment for other people within USA Swimming.”

Sunday’s session, which begins at 10:30 a.m. PT, will air live on the Pac-12 Network. Both sessions will also be available to stream live for authenticated Pac-12 Networks subscribers via the Pac-12 Now app and Pac-12.com.