Padraig Harrington and Tiger Woods have both had days to forget at the Phoenix Open.

Harrington has dropped four shots for his second round so far to sit on 4-over par for the tournament in Arizona.

But former World No 1 Woods carded an 11-over par 82, his worst single round score as a professional, to slump to the foot of the leaderboard on 13-over par.

American Justin Thomas leads the field by a shot on 7-under par.