Lydia Jacoby of Seward swims to another medal and another unofficial record in World Cup meet

Another day, another medal and another unofficial junior national record for swimmer Lydia Jacoby, the 17-year-old Olympic champion from Seward.

Jacoby placed second in Sunday’s 50-meter breaststroke at a FINA World Cup short-course swimming meet in Berlin, where she picked up a medal and an unofficial U.S. record for the second straight day.

Israel’s Anastasia Gorbenko won the gold with a time of 29.61 seconds. Jacoby took silver with a personal-best time of 30.04, and Kim Busch of the Netherlands claimed bronze in 30.43.

Jacoby’s time is faster than the previous unofficial record for Americans 18 or younger -- Lilly King’s 30.13 from 2014. King is a five-time Olympic medalist who won the 100-meter breaststroke at the 2016 Summer Olympics and took bronze in the race Jacoby won at the recent Tokyo Olympics.

On Saturday, Jacoby turned in a bronze-medal finish in the 100-meter breaststroke with an unofficial junior national record of 1:05.20.

The records are unofficial because American swimmers rarely swim short-course races measured in meters. Though such competitions are common in Europe, short-course races in the United States tend to be measured in yards.

As a result, USA Swimming keeps short-course records for races held in yards but not for those held in meters. To fill the void, started keeping track of the top American times in short-course meter races; the records are unofficial because they do not come from USA Swimming, the sport’s national governing body.