First off, the leader is Chris Wondolowski and unless San Jose starts to fade or the stretch run has someone go made (maybe like another couple 6 goal months?) he should be the MVP. There is no doubt he is the Most Valuable Player in the league right now. Where it gets interesting for Sounders fans is that they have four players that received at least one vote on the 20 ballots.
Osvaldo Alonso is on 4 ballots from SB Nation MLS writers. A non-Seattle writer has him as number one. Another non-Seattle has him at second best. Two of "us" voted him second. One Sounders writer didn't vote for him at all. Mauro Rosales, the assist king, shows up on three ballots. None are from Seattle. One is for second, the other two for third. It wouldn't be surprising if either finish the year in an SBN top 3, but both are unlikely to make the MLS short-list as neither are goal scorers and that's where the vote tends to go.
The Sounders two strikers also get some love. Eddie Johnson got the other local vote, with a second place. He's had a strong season and he's new to the team from last year, if he goes on a late run of goals like his July he could get stronger consideration. His strike partner had that great August and earned single vote for second as well.
With Seattle's amazing defense and their performance when he takes the field Michael Gspurning should get late consideration. Two other keepers got votes, including the current second place, but not even close to first, Andy Gruenebaum. Gspurning led Seattle to a 9-2-2 record in his starts with 5 shutouts (12th in the league with most keepers having twice the starts). The Austrian is 1st in Goals Against Average and Winning Percentage for keepers with more than two starts.
But you know what happens when you have five players who deserve top 3 consideration in an MVP race? None get first. And the Sounders almost certainly don't deserve first. They are too talented for them to be considered a one player team.