GREEN BAY, Wis. (AP) – The banged-up Packers are on the mend.  Receivers Randall Cobb and Jordy Nelson are back at practice this week. They’re key cogs in one of the league’s best passing attacks.  Their absences for much of the preseason have deprived quarterback Aaron Rodgers of two of his top targets. Rodgers has played just five series over three exhibition games, but hasn’t orchestrated a touchdown drive.  But Rodgers and coach Mike McCarthy don’t seem too worried. It appears Cobb and Nelson will be ready for the season opener Sept. 8 against the 49ers.