In addition to running backs Brian Robinson and Najee Harris, wide receiver DeVonta Smith and linebacker Terrell Lewis will serve a suspension in the first half against Duke, per BamaInsider.com.

Robinson and Harris are the Tide’s top two backs. Smith is one of the Tide’s best wide receivers, and Lewis is one of the team’s top defenders. The four players missed a team function earlier during fall camp, per reports.

Missing Smith isn’t as big as missing Lewis. Alabama has a plethora of wide receivers outside of Smith. He caught 42 passes for 693 yards and six touchdowns.

Lewis, however, is a key cog in the Tide’s pass rush and looks primed for a big season. He missed all of last year due to an ACL injury and is listed as the team’s starting SAM linebacker.

Alabama and Duke kickoff Saturday at 3:30 p.m. ET from Atlanta’s Mercedes-Benz Stadium.