Mark deJonge of Canada, who had set an Olympic best in the heat just prior to McKeever’s, won his semifinal and also advanced.
American Tim Hornsby qualified for Final B, which will determine places 7-12.
In the canoe 200m, Ivan Shtyl of Russia set an Olympic best in the semifinals of 40.346, moving into the Saturday’s semifinals.
Yuri Cheban of Ukraine and Jevgeni Shuklin of Lithuania won the other semifinals.
In the kayak doubles, Yury Postrigay and Alexander Dyachenko of Russia won their semifinal in an Olympic-best 32.051 seconds, winning their semifinal and advancing to the final.
American Carrie Johnson was eliminated in the semifinals of the kayak 200 meters, ending her Olympic career and sending her off to veterinary school at UC-Davis.
World champion Lisa Carrington of New Zealand set an Olympic best in the event (40.528) and advanced to the final on Saturday, the last day of canoe/kayak competition.
Hungary won two gold medals in the flatwater competition Wednesday at Eton Dorney.
Rudolf Dombi and Roland Kokeny won the kayak double 1000m gold, narrowly edging the Portuguese pair, Fernando Pimenta and Emanuel Silva by .053. Germany took the bronze.
Hungary also won the men’s kayak four over Germany, with Belarus taking the bronze.
The Germanys won medals in all four races on Wednesday, winning bronze in the men’s single kayak 1000m and gold in the men’s canoe single 1000m as well.
Sebastian Brendel won the canoe single gold, with David Cal Figueroa of Spain taking silver and Mark Oldershaw of Canada winning the bronze. For Oldershaw, it marked the first medal for his family, which sent grandfather Bert, uncles Dean and Reed and father Scott to the Olympics before him.
In the men’s men’s single kayak, Erik Vera Larsen of Norway won gold and Adam van Koeverden silver.
Miroslava Knapkova of the Czech Republic won the gold in single sculls, the final rowing event at Eton Dorney.
Fie Udby Erichsen of Denmark won the silver and Kim Crow of Australia added a bronze to the silver she won in double sculls.
American Genevra Stone finished first in Final B, giving her a seventh place finish.
Zac Purchase and Mark Hunter added to Britain’s rowing medal haul Saturday morning on the final day of racing at Eton Dorney, winning silver in the lightweight double sculls.
Purchase and Hunter settled for silver by a narrow margin, finishing six-tenths of a second behind Mads Rasmussen and Rasmus Quist of Denmark. Storm Uru and Peter Taylor of New Zealand took the bronze.
Britain earlier won gold in women’s lightweight double sculls and men’s four. Overall, the host country won nine rowing medals, including four golds.
The U.S. men’s four crew won bronze Saturday at Eton Dorney, finishing behind Britain and Australia.
The American quarter of Glenn Ochal, Henrik Rummel, Charlie Cole, Scott Gault posted a time of 6 minutes 7.20 seconds, well behind the 6:03.97 posted by the winning British team.
The British did it again, this time winning gold in the women’s lightweight double sculls Saturday on the final day of competition at Eton Dorney.
Katherine Copeland and Sophie Hosking won in seven minutes 9.30 seconds, ahead of Dongxiang Xu and Wenyi Huang of China (7:11.93) and Christina Giazitzdou and Alexandra Tsiavou of Greece (7:12.09).
Americans Kristin Hedstrom and Julie Nichols finished fifth in Final B, putting them in 11th place overall.
Track and field stars Allyson Felix and Carmelita Jeter race in the 100 meters, plus other events to watch Saturday at the London Olympics.
A German rower is the latest athletes to leave the Olympics:
The 23-year-old [Nadja Drygalla] is reportedly dating the leader of the Rostock National Socialists – an extremist party described by German intelligence as racist, anti-Semitic and inspired by the Nazis.
A member of the German women's eight crew team has left London after a report accused her of sympathizing with right-wing extremists.
Anna Watkins and Katherine Grainger gave the British rowing team yet another gold Friday in women’s double sculls, easily winning at Eton Dorney in 6 minutes 55.82 seconds.
Australia’s duo of Kim Crow and Brooke Pratley won silver in 6:58.55 and Poland’s Magdalena Fularczyk and Julia Michalska took bronze well behind in 7:07.92.
The U.S. pair of Margot Shumway and Sarah Trowbridge finished last in 7:10.54.
Britain got two more rowing medals Friday, a pair of bronzes in men’s events.
Alan Campbell was third in single sculls. Mahe Drysdale of New Zealand took the gold and Ondrej Synek of the Czech Republic won silver.
In the pairs, George Nash and William Satch won bronze behind Eric Murray and Hamish Bond of New Zealand and Germain Chardin and Dorian Mortelette of France.
In the B final of the pairs competition, the U.S. duo of Thomas Peszek and Silas Stafford were second, giving them an eighth place finish at these Games.
In the other medal event contested Friday, Germany won gold in men’s quadruple sculls, with Croatia taking the silver and Australia the bronze.
Saturday is the final day of rowing competition, with four medal events on the schedule.