Khalil Delshon Mack (Kah-leel; born February 22, 1991) is an American football linebacker for the Los Angeles Chargers of the National Football League (NFL). He played college football at Buffalo and was selected 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, defensive end and outside linebacker, in the same season. In 2018, Mack was traded to the Chicago Bears for two first-round draft picks and signed a six-year, $141 million extension, becoming the highest-paid defensive player in NFL history at the time. He was traded to the Chargers in 2022.