Milan confirmed on Monday that they had agreed a deal that will see the Los Angeles Galaxy star join them in January.
“I need to give myself the best chance possible to make the World Cup squad and playing for Milan on loan will help me to do that,” he explained.
“I genuinely enjoyed my time at Milan and I look forward to meeting the players and staff again.”
He added: “I’m thankful to Tim Leiweke and Bruce Arena for allowing me this opportunity.
“I’m committed to LA Galaxy and MLS in the long term and remain as passionate as ever about growing the game of soccer in America.
“I’m completely focused on ending this season on a high note with my club by winning the MLS Cup.”
