San Francisco 49ers defensive end Dee Ford returned to action for Sunday's win over the New Orleans Saints. He missed the two previous weeks. However, it appears as if his return won't last long. The 2018 Pro Bowler is expected to miss the next four weeks.

According to Ian Rapoport of the NFL Network, Ford is expected to miss the next four weeks with a hamstring injury. That means his regular season is done. If the 49ers were to gain a first-round bye — which they currently possess as the NFC's No. 1 seed — he would not miss a postseason game.

The 49ers acquired Ford in an offseason trade with the Kansas City Chiefs. His former team placed him on the franchise tag. San Francisco, upon the arrival of the pass-rusher, signed him to a five-year contract worth $85 million.

In games in which he's played, Ford has added another threat to a lethal 49ers pass-rush. In 11 games played, he has 6.5 sacks, 14 combined tackles, six tackles for loss, and six quarterback hits. He has started just two out of the 11 games, acting more as a situational pass-rusher as he's battled through lower-body injuries for much of the campaign.

Ford's injury was just one of many costly ones for the 49ers in their win over the Saints. Starting center Weston Richburg went down with a torn patella tendon while cornerback Richard Sherman, like Ford, suffered a hamstring injury, which will set him back a few weeks.

Though the 49ers are sitting pretty at 11-2, there is cause for concern with three starters suffering injuries as of late.