The following are the transactions that took place before the MLS College and Supplemental Drafts.
1. San Jose traded Rhett Harty and its first-round pick in the College Draft (No. 3) to New York/New Jersey for Troy Dayak.
2. Kansas City traded Jeff Causey to Washington for its first-round pick in the College Draft (No. 1) and Garth Lagerway.
3. Washington traded its first-round (No. 1) and third-round picks (No. 21) in the Supplemental Draft to New York/New Jersey for its first-round pick in the College Draft (No. 2).
4. New York/New Jersey traded its first-round pick in the College Draft acquired from San Jose (No. 3) to Dallas for its first-round pick in the Supplemental Draft (No. 8).
5. Dallas traded its second-rond pick in the College Draft (No. 18) to Tampa Bay for its second-round pick in the Supplemental Draft (No. 14).
6. San Jose traded its second-round pick in the Supplemental Draft (No. 13) to Columbus for Ramiro Corrales.
7. New York/New Jersey traded its first-round pick in the Supplemental Draft acquired from Dallas (No. 8) to Washington for its second-round pick in the Supplemental Draft (No. 11), its second-round pick in the College Draft (No. 11) and Matt Olson.