Aaron Josef Hernandez (November 6, 1989 – April 19, 2017) was an American professional football player who was a tight end. He played in the National Football League (NFL) for three seasons with the New England Patriots until his arrest and conviction for the murder of Odin Lloyd.

Hernandez played college football for the Florida Gators, earning first-team All-American honors and winning the 2009 BCS National Championship Game. Due to concerns towards his size and off the field incidents, he was not selected until the fourth round of the 2010 NFL draft by the Patriots. Alongside teammate Rob Gronkowski, Hernandez formed one of the league's most dominant tight end duos, becoming the first pair to score at least five touchdowns each in consecutive seasons for the same team. He also made an appearance in Super Bowl XLVI.

During the 2013 offseason, Hernandez was arrested and charged for the murder of Odin Lloyd, a semi-professional player who was dating the sister of Hernandez's fiancée. Following his arrest, Hernandez was immediately released by the Patriots. He was found guilty of first-degree murder in 2015 and sentenced to life in prison without the possibility of parole at the Souza-Baranowski Correctional Center. While on trial for Lloyd's murder, Hernandez was also indicted for the 2012 double homicide of Daniel de Abreu and Safiro Furtado; he was acquitted after a 2017 trial.

Days after being acquitted of the double homicide, Hernandez was found dead in his cell, which was ruled a suicide. His conviction for Lloyd's murder was initially vacated under the doctrine of abatement ab initio because Hernandez died during its appeal, but was reinstated in 2019 following an appeal from prosecutors and Lloyd's family. Hernandez was posthumously diagnosed with chronic traumatic encephalopathy (CTE), which has led to speculation over how the condition may have affected his behavior.