What began as one of the NFL’s most remarkable success stories ended, more than a decade later, in deportation, mental health struggles, and a career that never lived up to its early promise.U.S. immigration authorities have confirmed the deportation of former Indianapolis Colts linebacker Daniel Adongo, who left the country on June 20 after an order issued by an immigration judge with the Department of Justice. The 37-year-old Kenyan had been in the custody of U.S. Immigration and Customs Enforcement (ICE) for several months.Brittany Mahomes creates a special family moment as Patrick begins Chiefs training campAccording to ICE, Adongo remained in the United States after his visa expired in 2016, one year after his brief NFL career came to an end. The agency said he was detained without bond under the Laken Riley Act and classified him as a "dangerous" individual because of his criminal record."Those who violate U.S. immigration laws must also be held accountable, including former professional athletes," Douglas Thompson, deputy field office director for ICE in Chicago, said in a statement.The agency did not disclose the country to which Adongo was deported.Who is Daniel Adongo?Adongo's arrival in the NFL captured the attention of the American sports world. Born in Kenya and raised as a rugby player, he was competing in South Africa's Super Rugby competition when the Colts took a chance on him in 2013 through the franchise's international player development program.What made his story extraordinary was that he had never played American football—and had reportedly never even watched a full game—before signing with the Indianapolis franchise.For months, the coaching staff essentially taught him the sport from scratch, introducing him to the rules, positions, and fundamentals of football. His exceptional athleticism convinced the organization that he could develop into a long-term project.Patrick Mahomes’ first warm-ups and drills at training camp excite Chiefs fans ahead of the seasonHowever, the gamble never paid off. Over three seasons, Adongo appeared in just five regular-season games and recorded only one defensive tackle before being released in December 2015. During his time with the Colts, he earned approximately $694,000 in salary.His departure from the organization coincided with the first police responses to his home over alleged domestic violence incidents. Although no charges were filed at the time, those episodes marked the beginning of a long series of legal troubles.A decade defined by legal issues and mental health strugglesAfter leaving the NFL, Adongo's personal situation deteriorated significantly.According to ICE, he was convicted in 2020 of misdemeanor criminal damage to property and sentenced to 364 days in jail. He was also arrested at various times on allegations of intimidation, battery, and disorderly conduct, although those cases were ultimately dismissed.Court documents reviewed by The Indianapolis Star, part of the USA TODAY Network, reveal that judges ruled on two separate occasions that Adongo was not competent to stand trial because of his mental health condition.One report prepared by Dr. Jason Jaronik stated that the former player was suffering from acute psychosis and raised the possibility that he had sustained a traumatic brain injury related to his career as a high-level athlete.His mother, Betty Adongo, requested additional medical evaluations, believing that his mental decline was linked to repeated head trauma suffered during his playing career. However, to date, there is no scientific evidence confirming such a connection in his specific case.Daniel Adongo's story, once celebrated as one of the NFL's most unique and promising international development projects, ultimately became a case involving immigration violations, legal proceedings, and severe mental health decline—highlighting the challenges some former athletes face when their careers end far earlier than expected.