Trojans finish with seven swimming titles, most since 1977.
Junior top seed after prelims with Quintero right behind him; Morozov, Davis, Spinazzola also reach finals.
Trojans crush record in 400y medley relay, but out-touched at the wall.
Defending champions Morozov and Colupaev lead Trojans into four-day meet starting Sunday.
Trojans look to finish strong as postseason looms.
THIS SEASON: Nick Karpov, a 2013 senior from Canada, is among USC's top returning backstrokers who is building on three consecutive NCAA appearances. He is USC's fourth-fastest ever in the 100y back and seventh in the 200y back.
2012: In his third straight trip to the NCAA Championships as a 2012 junior, Karpov was USC's top finisher in the 100y back, taking 18th in 47.10. He was also 24th in the 200y back (1:44.09) and helped USC's 200y medley relay to 12th ... At the 2012 Pac-12 Championships, Karpov was 15th in the 100y back (48.93) and 20th in the 200y back (1:47.70) ... He was a finalist in the 100m back at the 2012 Canadian Olympic Trials, taking eighth, and was 22nd in the 100m back and tied for 37th in the 100m free.
2011: Karpov competed in three events at the 2011 NCAA Championships as a sophomore, finishing 23rd in the 100y back (47.38), 25th in the 200y back (1:43.99) and helped USC to 12th in the 200y medley relay ... At the 2011 Pac-10s, Karpov earned his second career finals appearance, taking eighth in the 200y back (1:44.44). He was also 11th in the 100y back (47.72) and 29th in the 50y free (20.92) ... He was tabbed a 2011 Pac-10 All-Academic team honorable mention pick.
2010: Karpov, who joined the Trojans as a freshman in the spring of 2010, swam on two relays at the 2010 NCAA Championships. He earned All-American honors by helping USC to a sixth-place finish in the 800y free relay. He also led off USC's 13th-place 200y medley relay ... At the 2010 Pac-10s, Karpov was a finalist in the 100y back, claiming seventh in 48.28. His 47.87 in prelims was USC's top time of the year. He was also 10th in the 200y back (1:44.23).
HIGH SCHOOL: Karpov graduated from Avondale Secondary in North York, Ontario ... At the 2009 Canadian Spring Nationals, he won bronze in the 100m back ... He is a seven-time medalist at the Canada Games (two golds, four silvers, one bronze).
CLUB/COACH: Toronto Swim Club/John Grootveld.
PERSONAL: He was born on June 7, 1990 ... He was born in Israel and raised in Canada ... Planning to major in business administration.
KARPOV'S PERSONAL RECORDS: