The Golden Knights assigned Zykov to AHL Chicago on Tuesday.
Zykov scored a power-play goal and registered five shots on goal in a 6-3 win over Vancouver on Sunday.
The Golden Knights recalled Zykov from AHL Chicago on Monday, Jesse Granger of The Athletic reports.
Zykov has been placed on waivers by the Golden Knights to be sent down to the AHL, Elliotte Friedman of Sportsnet reports.
Zykov has been suspended 20 games for violating the terms of the NHL/NHLPA Performance Enhancing Substances Program, Jesse Granger of The Athletic reports.
Zykov opened the scoring for Vegas in its 3-1 win over San Jose on Saturday.
Zykov was benched in the final 20 minutes of Saturday's 4-3 loss to the Blue Jackets, Adam Hill of the Las Vegas Review-Journal reports.
Coach Gerard Gallant told reporters there's a good chance Zykov will arrive in Vegas on Wednesday, Jesse Granger of The Athletic reports.
The Golden Knights claimed Zykov off of waivers on Saturday, Elliotte Friedman of Sportsnet reports.
Zykov landed on the waiver wire Friday.