San Francisco 49ers sign defensive end Jermaine Cunningham

The San Francisco 49ers have completed the signing of free agent defensive end Jermaine Cunningham.

The 25-year-old was on the market following his release by the New England Patriots as part of their roster cutdown in August.

Jim Harbaugh's side moved to sign Cunningham as a means of replacing linebacker Aldon Smith, who is currently seeking help for his personal problems after being placed on the non-football injury list by the team.

Cunningham registered three and a half sacks during his three years with the Patriots.