The No. 18 men's swimming and diving team defeated UNLV, 152-80, while the women's team fell 138-105 Friday night at the Richards Building.
Men's swimming coach Tim Powers said he was pleased with his whole team's performance, especially in the 400 free and 400 medley.
"I thought we performed really well, but it's still early in the year," Powers said. "To be going 3-1 on the (400 free) relay and finishing in 3:22 in the medley relay in this altitude, those are some of the best times you're going to see in the country"
BYU finished with the first, second and fourth best times in the 400 free with the A team finishing in 3:01.84.
On the women's side, coach Stan Crump said his team fell behind early and may have gotten discouraged. But he said his team would improve throughout the year.
"I thought we swam well," Crump said. "I thought we swam better as the meet went on. They (UNLV) just buzz-sawed us at the first."
Crump was pleased with the swimming of Shannon Bloom, who finished second in the 200 free and won the 100 free.
BYU swept all of the diving events with Melinda Jones and Scott Randall winning both the 1- and 3-meter competitions.
The women's team will compete again Nov. 8 against San Diego State at 1 p.m. in the Richards Building.