Three-time MLS All-Star defender Kai Wagner returned to the Philadelphia Union on Friday, being acquired via transfer from Birmingham City FC.
Philadelphia also sent $100,000 in General Allocation Money to Sporting Kansas City to swap spots in the waiver order, landing the No. 1 position to claim Wagner in exchange for the No. 22 spot.
Wagner spent seven seasons with Philadelphia (2019-25) prior to the seven-month stint with Birmingham FC. He had three assists in 18 matches across all competitions
for Birmingham.
"Coming back to Philadelphia feels incredibly meaningful for me and my family. Over the years, this city has become our home, and returning was a decision that came from the heart," Wagner said in a news release. "My time away gave me the opportunity to experience a new challenge, but it also reinforced how much this club, this city, and our supporters mean to me.
"There's something special about representing the Union and playing in front of our fans. I believe in what this club stands for, its culture, ambition, and commitment to competing at the highest level. I'm excited to be back, and grateful for the opportunity to help write the next chapter."
Wagner is a two-time MLS Best XI pick and helped Philadelphia win two Supporters' Shield awards for best regular-season record (2020, 2025). He was also a stalwart on the 2022 squad which lost to Los Angeles FC in the MLS Cup Final.
Wagner holds the franchise record of 63 assists. He has eight goals in 204 regular-season matches.
In 2025, he had two goals and 11 assists in 32 matches and anchored a defense that gave up an MLS-low 35 goals and registered 14 clean sheets.
"We're thrilled to welcome Kai back to Philadelphia. He's been an integral part of this club's success and has consistently established himself as one of the top left backs in Major League Soccer," Philadelphia sporting director Jon Scheer said. "Kai understands what this club represents, what our supporters expect, and the standards we hold ourselves to every day. We're confident he'll make an immediate impact this season as we pursue our goals and be an important part of our club's future."
The Union (1-10-4, 7 points) are struggling with the fewest points in the league. They resume play after the nearly two-month international break for the World Cup on Wednesday when they host the New York Red Bulls.
--Field Level Media
