San Francisco 49ers linebacker Dre Greenlaw suffered a right calf injury in the first quarter of the game against the Miami Dolphins, marking another setback in his return from a torn left Achilles. Greenlaw, who had only recently returned from injury, played just four snaps before being ruled out at halftime. This latest injury raises concerns about his future in the league as he is set to become an unrestricted free agent after the season.

• Dre Greenlaw's injury history continues to impact his playing time.
• Greenlaw's future in the league may be at risk if he cannot stay healthy.