STOCKHOLM, Sweden — Peter Marshall has done it again, this time breaking the short course record in the 50-meter backstroke at a World Cup meet in Sweden.

Marshall won the 50 backstroke in 23.05 seconds Wednesday, beating Australian Robert Hurley's mark of 23.24. Another American, Randall Bal, also went under Hurley's time for second place at 23.07.

On Tuesday, Marshall regained the 100-meter backstroke record in 49.94 seconds, breaking countryman Ryan Lochte's 2006 time of 49.99. Lochte took the record from Marshall.

Therese Alshammar of Sweden also set a record Wednesday in the women's 50-meter butterfly in 25.31 seconds, topping the 25.32 by Australia's Felicity Galvez.