Potomac Falls All-Met and Virginia alum Matt McLean headlined a group of Washington-area Olympic trials swimmers on the first day of competition in Omaha on Monday.

McLean entered the 400-meter freestyle as the defending national champion and a favorite for an Olympic berth, but he slipped to ninth place in the prelims and missed out on a spot in the final heat by seven-tenths of a second.

Amanda Kendall, the 2009 All-Met Swimmer of the Year, had good and bad news: She posted a personal best in the preliminaries of the women’s 100 butterfly to qualify 10th heading into the night’s semifinal race, but she finished 13th overall and did not advance to Tuesday night’s final.

Still, it was an optimistic swim for the Fairfax native, who is scheduled to compete in her best event, the women’s 100 freestyle, later this week.

In other races, Walter Johnson alum Eric Friedland (Texas) progressed out of the preliminary heats of the 100 breaststroke in the morning but finished last in the 16-swimmer semifinal later Monday night.

In the same event, 2000 Olympic medalist and Lake Braddock alum Ed Moses failed to advance past the prelims after he finished 21st. Both Friedland and Moses will compete in the 200 breaststroke later this week.

In his first career Olympic trials swim, rising Thomas Jefferson sophomore and 2012 All-Met Andrew Seliskar re-broke his local 15-16 year-old age group resident record in the 400 individual medley by 2.7 seconds and won his heat in the process. Seliskar, 15, is among the youngest male swimmers competing in Omaha.