Vermeer, 34, has featured for Dutch sides Ajax and Feyenoord over his career. He has five caps for the Netherlands national team.
Reyna scored his first goal for Dortmund’s senior team on Saturday in a friendly.
The Lions’ captain gave his first impression of new coach Óscar Pareja and looked ahead to the 2020 season.
Lopez has played with LA Galaxy II since 2016 and has also featured for U.S. youth national teams.
Iloski scored 23 goals across 46 appearances at UCLA.
Through the partnership, Bryant will look to help support the continued expansion of MLS.
The Canadian international played two seasons with Barcelona B, racking up three goals and two assists
The 25-year-old Dutch midfielder had one goal and one assist in 18 appearances for Krasnodar this season
Marić appeared in 67 matches, recording 13 clean sheets over three seasons on loan with Lillestrøm SK in the Eliteserien, Norway’s top flight
The defensive midfielder started 21 games last season and recorded two assists