The Los Angeles Rams activated wide receiver Puka Nacua from injured reserve prior to Thursday night's game against the Minnesota Vikings.

The Rams placed linebacker Troy Reeder (hamstring injury) on injured reserve in a corresponding move. Reeder, a starting inside linebacker, will be sidelined for at least four games.

Nacua, who suffered a sprained posterior cruciate ligament in Week 1, has missed the Rams' last five games. The injury was an aggravation of a knee injury sustained in training camp.

The Rams have been without their top two receivers since Week 2, but Cooper Kupp will also return from a sprained ankle on Thursday night.

Last season, Nacua set records for the most receptions (105) and receiving yards (1,486) by a rookie in NFL history. Nacua had four catches for 35 yards in the Rams' season opener before his injury.