In the 2010-2011 year, Pebley was named to his second Junior National Team, this time for the 100-meter backstroke and the 200-meter backstroke. Pebley attended the 2011 World Junior Championships representing team USA. At Worlds, Pebley won three gold medals in the 100-meter backstroke (55.01), the 200-meter backstroke (1:58.73 – meet record), and as a member of the 400-meter medley relay. Pebley also took home a silver medal in the 50-meter backstroke (25.75).
