| Players In | Players Out | 
|---|---|
| Kenwyne Jones (trade) | Cameron Iwasa (option declined) | 
| Alexander Tambakis (trade)	 | Soni Mustivar (option declined) | 
| Khiry Shelton (trade) | Erik Palmer-Brown (out of contract) | 
| Yohan Croizet (transfer) | Cameron Porter (retired) | 
| Zach Wright (Homegrown signing) | Kevin Oliveira (trade) | 
| Emiliano Amor (loan) | Tyler Pasher (trade) | 
| Matt Lewis (Homegrown signing) | Kenwyne Jones (retired) | 
| Johnny Russell (transfer) | Alexander Tambakis (option declined) | 
| Felipe Gutierrez (signing) | Latif Blessing (Expansion Draft) | 
| Eric Dick (SuperDraft) | Saad Abdul-Salaam (trade) | 
| Graham Smith (SuperDraft) | Benny Feilhaber (trade) | 
| Brad Evans (signing) | Andrew Dykstra (trade) | 
| Wan Kuzain Wan Kamal (Homegrown signing) | Soony Saad (waived) | 
| Krisztian Nemeth (trade) | Kevin Ellis (waived) | 
| Andreu Fontas (signing) | Zach Wright (waived) | 
| James Musa (waived) | |
| Matt Lewis (waived) | |
| Emiliano Amor (contract terminated) | 
Transaction Timeline
- Nov. 27, 2017: Sporting KC exercises options on 11 players
- Dec. 10, 2017: Sporting KC acquires two players in trade with Atlanta United FC
- Dec. 12, 2017: LAFC takes Latif Blessing in MLS Expansion Draft
- Dec. 14, 2017: Sporting KC acquires forward Khiry Shelton in trade with New York City FC
- Dec. 15, 2017:
- Jan. 3, 2018: Sporting KC acquires $400,000 in allocation money from LAFC in exchange for Benny Feilhaber
- Jan. 17, 2018: Sporting KC signs forward Zach Wright as a Homegrown Player
- Jan. 18, 2018: Sporting KC acquires defender Emiliano Amor on loan
- Jan. 22, 2018: Sporting KC signs defender Matt Lewis as a Homegrown Player
- Jan. 31, 2018: Sporting KC acquires Scottish winger Johnny Russell in a transfer from English club Derby County FC
- Feb. 6, 2018: Sporting KC signs Chilean international Felipe Gutierrez as a Designated Player
- Feb. 8, 2018: Sporting KC acquires future draft pick from Colorado in exchange for goalkeeper Andrew Dykstra
- Feb. 8, 2018: Sporting KC waives forward Soony Saad
- Feb. 15, 2018: Sporting KC signs draft picks Eric Dick and Graham Smith to MLS contracts
- Feb. 20, 2018: Sporting KC signs free agent and two-time MLS Cup champion Brad Evans
- Feb. 27, 2018: Sporting KC waives Kevin Ellis and Zach Wright
- March 1, 2018: Sporting KC waives midfielder James Musa
- April 13, 2018: Sporting KC signs Kuzain as Homegrown Player
- June 27, 2018: Sporting KC waives Matt Lewis, who signs with Rangers on USL contract
- Aug. 6, 2018: Sporting KC acquires forward Krisztian Nemeth from New England
- Aug. 8, 2018: Sporting KC signs Spanish defender Andreu Fontas, parts ways with Emiliano Amor