Montero led the Whitecaps in scoring during the 2017 season while on loan from Chinese club Tianjin TEDA.
2019 ScheduleAll times ET
The 20-year-old has captained Lyon's reserve squad since August 2018. He also wore the armband while playing on the club's Under-19 team.
The Vancouver Whitecaps added Tunisian center back Jasser Khemiri, the team announced Friday.
The Vancouver Whitecaps continued a busy offseason Wednesday by signing South Korean midfielder Hwang In-beom and veteran right-back Scott Sutter.
Expansion side FC Cincinnati selected UCLA midfielder Frankie Amaya No. 1 overall in the 2019 MLS SuperDraft on Friday.
Sporting Kansas City signed free-agent defender Rodney Wallace to a one-year contract, and traded two draft picks to Vancouver for Erik Hurtado.
FC Cincinnati has acquired defender Kendall Waston from the Vancouver Whitecaps in exchange for up to $825,000 in allocation money.
Zac MacMath, Maxi Urruti and Tesho Akindele were among the notable names swapping teams in Major League Soccer's half-day trade window on Sunday.
Former Vancouver Whitecaps winger Alphonso Davies, 18, signed for Bayern in July for an initial fee of €11.5 million.
Vancouver Whitecaps FC has named Marc Dos Santos to be their next manager, the organization announced on Wednesday.
Alphonso Davies scored two goals in his final Major League Soccer game Sunday as the host Vancouver Whitecaps beat the Portland Timbers 2-1.
Second-half substitute Jordon Mutch's goal in the 65th minute gave the visiting Vancouver Whitecaps a comeback 2-2 draw with LAFC on Sunday.
Daniel Salloi scored the tiebreaker in the 82nd minute as Sporting Kansas City scored four second-half goals to win 4-1 at Vancouver on Wednesday.
The Vancouver Whitecaps kept their playoff chances alive with a 2-1 win over Toronto FC that ended the defending champions postseason hopes.
Zlatan Ibrahimovic scored two goals as the host Los Angeles Galaxy blanked the Vancouver Whitecaps 3-0 on Saturday night.
The Whitecaps are four points out of the sixth and final playoff spot in the Western Conference with five matches remaining in the regular season.
FC Dallas beat the Vancouver Whitecaps 2-1 on Sunday to climb into first place in Major League Soccer's Western Conference.
Raul Ruidiaz scored two goals as the visiting Seattle Sounders edged the Vancouver Whitecaps 2-1 in Major League Soccer action Saturday night.
Alphonso Davies scored his sixth goal of the season, helping the host Vancouver Whitecaps remain within a point of the playoff places.
Kei Kamara's goal in the 68th minute gave the visiting Vancouver Whitecaps a 3-2 comeback win over the San Jose Earthquakes in Major League Soccer.