By W.G. RAMIREZ
HENDERSON, Nev. (AP) — The Las Vegas Raiders’ offensive line has underachieved through four games and the task won’t get any easier this week. Former Raiders linebacker Khalil Mack and the Chicago Bears are visiting Las Vegas on Sunday and they’re bringing an aggressive pass rush. Mack’s four sacks are tied for 10th in the NFL, while the team’s 15 sacks are No. 1. Carr has been sacked 12 times this season and been pressured 47 times.