The Chargers’ offense should soon be getting some reinforcement.

On Monday, Los Angeles designated running back J.K. Dobbins for return from injured reserve. Dobbins has spent the past four weeks on IR after sustaining a knee injury in Week 12 against the Ravens.

Dobbins began practicing with the team on Monday, opening a 21-day window during which he can participate in all team activities without being counted against the 53-man roster.

He may be activated during those three weeks and could return as soon as before this weekend’s game against the Patriots.

Getting Dobbins is huge for an offense that has struggled with efficiency on the ground. In the past three weeks, the Chargers have averaged 81.0 rushing yards per game, which ranks 28th in the NFL.

Dobbins has 158 carries for 766 yards and eight touchdowns this season.