Khalil Delshon Mack (born February 22, 1991) is an American football outside linebacker for the Chicago Bears of the National Football League (NFL).
He played college football at Buffalo, and was drafted by the Oakland Raiders with the fifth overall pick in the 2014 NFL Draft.
Mack holds the all-time NCAA record for forced fumbles and is also tied for career tackles for loss in the NCAA.
In 2015, he became the first player in NFL history to be selected first-team All-Pro at two different positions (unanimous selection at defensive end and consensus selection at outside linebacker) by the Associated Press (AP), the Pro Football Writers of America (PFWA), and the Sporting News (SN) for performance in the same season.
In September 2018, Mack was traded to the Bears for two first-round draft picks and signed a six-year, $141 million extension, becoming the highest-paid defensive player in NFL history.
He is widely recognized as one of the most dominant defensive players currently playing in the NFL.