Arceneaux had seven catches for 164 yards and two TDs in the Lions' 27-23 loss to Edmonton. Arceneaux stands fifth among CFL receivers with 67 catches for 956 yards and seven touchdowns.
Smith returned a missed field goal 109 yards for a TD in Ottawa's 29-12 home victory over Toronto. He finished the contest with 26 punt-return yards and 30 kickoff-return yards.
Mitchell was 29-of-43 passing for 361 yards and two TDs as Calgary held on to beat Winnipeg 36-34. It was the Stampeders' 10th straight victory and extended their unbeaten streak to 12 games.