INDIANAPOLIS — The Raiders are wasting no time trying to get Khalil Mack locked up to a contract extension. The team has made an initial long-term proposal to the star pass rusher and his side is looking it over, league sources told The Athletic.



Mack, the fifth overall pick in 2014, is entering the final year of his rookie contract and is due to make $13.85 million next season. He had 10.5 sacks last season, a year after he won the NFL Defensive Player of the Year award with 11 sacks, five forced fumbles and interception return for a touchdown.



Mack’s extension could potentially top the six-year, $114.5 million contract that Broncos linebacker Von Miller signed in 2016, currently the richest deal for a defensive player in league history.



The process to get Mack signed long-term could take a little while, and there is no huge rush. After all, quarterback Derek Carr didn’t sign his five-year, $125 million deal until last...