user: Question: How many mls teams had player Jamel Wallace?
Columns: ['Pick #', 'MLS Team', 'Player', 'Position', 'Affiliation']
Types: ['real', 'text', 'text', 'text', 'text']
Sample row: [49.0, 'Philadelphia Union', 'Brian Perk', 'Goalkeeper', 'UCLA Seattle Wolves']
SQL:

assistant: SELECT COUNT("MLS Team") FROM "Table" WHERE "Player" = 'Jamel Wallace';