Araujo was born in Lompoc, California, and is of Mexican descent. He attended Lompoc High School.[4] After two years at Lompoc High School, he left home and joined Barça Residency Academy in Casa Grande, Arizona in 2017.[5]
Araujo made his professional debut in a 2–2 draw with Seattle Sounders FC 2 on 4 October 2018, coming on as an 88th-minute substitute for Nate Shultz.[7]
LA Galaxy
On 1 March 2019, LA Galaxy acquired Araujo after trading $50,000 of Targeted Allocation Money to Colorado Rapids to gain the first spot in the Waivers Order.[8]
Araujo made 108 total appearances with the Galaxy, scoring once in the regular season and again in the playoffs. He became a regular starter beginning in 2019 and finished 2021 and 2022 as the team's defender of the year.[9]
Barcelona
On 1 February 2023, FC Barcelona and LA Galaxy agreed on a transfer for Araujo. The paperwork, however, was delivered 18 seconds late,[10] and the deal was left in limbo after FIFA rejected the transfer but the Court of Arbitration for Sport overruled.[11] Ultimately, by 17 February Araujo was transferred to Barcelona.[9]
On 31 October, Araujo scored his first goal with the club in a 3–0 away win against Manacor to advance in the second round of the Copa del Rey.[14] On 1 December, he scored his first league goal with the club, scoring the first goal in their 2–0 win over Getafe.[15] On 7 January 2024, during a Copa del Rey match against Tenerife, Araujo picked up a red card for a violent conduct on Nacho Martínez after Nacho Martínez had gone down in the penalty area. On 10 January, it was announced that he would serve a four-match suspension.[16] He returned a month later on 10 February, coming on in stoppage-time for Marvin Park in their 2–0 win over Valencia.
On 18 June 2021, Araujo was named to the preliminary 59-player USMNT roster for the 2021 CONCACAF Gold Cup but was left off the final roster on 1 July 2021. Berhalter cited Araujo's dual citizenship and unwillingness to become cap-tied to the USMNT.[21]
Mexico
On 13 August 2021, sports media in Mexico reported that Araujo himself had filed and submitted the one-time switch to FIFA in order to join Mexico.[22] As of 4 October 2021 FIFA officially approved Araujo's case.[23][24]
On 27 November 2021, Araujo was included in the Mexico national football team call-up by Gerardo Martino for a friendly match against Chile set to take place on 8 December.[25] He was given a starting berth in Mexico's 2–2 draw, playing the full 90 minutes.[26] In making his debut, Araujo became the third player in the history of the Mexico–United States rivalry in having represented both national teams alongside Martín Vásquez and Edgar Castillo.[27]