Cavan Sullivan, 14, breaks Freddy Adu's youngest MLS player record - ESPN

Cavan Sullivan broke Freddy Adu's longstanding record as the youngest player to feature for a senior MLS side when he took the field for the Philadelphia Union in their match against the New England Revolution on Wednesday.

Sullivan, who is 14 years 293 days old and was called into the senior squad for the first time on Tuesday, came on late in the second half to break the record held by Adu in a runaway 5-1 win for the Union.

The young American signed the largest homegrown contract in Major League Soccer history on May 9, in a deal that stipulates Sullivan will transfer to English Premier League power Manchester City after he turns 18.

Sullivan, whose brother Quinn also plays for the Union and scored on Wednesday in the win, didn't have many opportunities on the ball, but he did have one good run toward the end of the game that ended with a powerful shot on goal from outside the penalty area.

Sullivan is also younger than any player who has appeared in the NBA, NHL, NFL, WNBA or Major League Baseball since at least 1970, according to the Elias Sports Bureau. Andrew Bynum, who debuted for the Los Angeles Lakers in 2005 at the age of 18 years, 6 days, holds that mark.

The youngest debut in the five biggest soccer leagues around the world since at least 1988 was Ethan Nwaneri, who came on for Arsenal in 2022 at 15 years, 181 days.

Adu held the record as the youngest to play for an MLS senior side since he took the field for D.C. United against the San Jose Earthquakes on April 3, 2004, at the age of 14 years, 306 days old. He scored 23 goals over a club career that took him from the United States to Europe and back to the U.S. again, where he last played for the Las Vegas Lights of the USL.

At 16 years, 234 days, Adu