Original sentence: * Portland will likely join the Heritage Cup, a derby formed in 2009 among MLS teams that carry on the names of their NASL predecessors.* The Portland Timbers are expected to continue a long-running Seattle-Portland Rivalry with Seattle Sounders FC.* The Vancouver Whitecaps FC, the other Cascadian USL-1 team joining MLS in 2011, who will compete along with Portland and Seattle Sounders FC in the "Cascadia Cup".Currently the Heritage Cup is played between the San Jose Earthquakes and Sounders FC, with the Whitecaps likely to join alongside the Timbers
Edited sentence: But Timbers fans like to claim the Seattle Sounders FC as a rival, but this is most likely due to the fact that the Seattle Sounders FC have been the most successful expansion franchise in the history of United States soccer and the Timbers fans are trying to leech on to the success of the Seattle Sounders FC.But if anything, the Seattle Sounders of the NASL had their biggest rivalry by far, with the Vancouver Whitecaps of the NASL.Expansion teams can't have rivalries.Not because of old teams that played 25 years ago.The Portland Timbers have zero rivalries because they are an expansion team.They are created on the field over years and years of playing.You can't create a rivalry