Aaron Donald is a professional American football player for the Los Angeles Rams of the National Football League (NFL). At the NFL Combine, Aaron set the record for fastest
40-yard dash time for a defensive tackle with a 4.68, a record that was previously
held by Tank Johnson, who ran a 4.69 in 2004.

Aaron has often been compared to football legend John
Randle. He was drafted by the St. Louis Rams in the first round
with the 13th overall pick of the 2014 NFL Draft.

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Aaron made his regular-season debut
against the Minnesota Vikings in September 2014 and finished the run with the 34–6 loss with four tackles.

Later in 2014, Aaron recorded three tackles and his first NFL sack during a
19–17 victory over the Tampa Bay Buccaneers. On October 13, 2014, he was given
his first career start against the San Francisco 49ers. He finished that game
with four solo tackles. 

In the 2015 Pro Bowl, Aaron was one of five rookies selected for the tournament. He won the NFL Defensive Rookie of the Year award and was named to the NFL
All-Rookie Team.

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Aaron’s career also had some rough patches, especially when in 2016, the player was ejected for making illegal contact with a referee in a 28–0 shutout loss to the San Francisco 49ers on Monday Night Football. Four days later, the defender was fined $21,269 for unnecessary roughness ($9,115) and unsportsmanlike conduct ($12,154).

However, in August 2018, Aaron became the highest-paid defensive player in NFL history after signing a $135 million contract extension with $87 million guaranteed.

On January 4, 2019, Donald Aaron was named to the APAll-Pro First Team, being the only unanimous selection in the squad. 

In the Super Bowl, Aaron recorded five tackles against the New England Patriots, but the Rams
lost by a score of 13–3. He
was ranked as the best player in the NFL by his peers on the NFL Top 100
Players of 2019.