The Dynamo welcome the 21-year-old Honduras international, who will join the team as a Young Designated Player.
Lopez joins from Honduran side C.D. Olimpia, where he has been with the first team since 2010. In 51 career league games with Olimpia, Lopez scored 18 goals and added 34 assists.
“We’ve seen him up close, including last year in Champions League and this year in the Gold Cup,” said Dynamo head coach Dominic Kinnear. “He is very versatile and a good fit for our team."
Lopez has experience with Honduras internationally at several levels. He was a member of the Olympic team which advanced to the quarterfinals in London last summer, and he also has eight caps with the full senior team, including five appearances in this summer's Gold Cup.
"I'm happy that we were able to execute this transfer and improve the team in this summer window,” said Dynamo president Chris Canetti. “Alex is a young, exciting player that Dom has targeted for some time, and an excellent addition for both our short and long-term outlook."
As a Young Designated Player (a player between 21-23 years old), Lopez’ salary will count as $200,000 against the salary cap.