Sad.

Golf legend Tiger Woods can't seem to find his footing in this sobriety test ... or in life! This dash cam video shows Woods struggling to walk as a Florida police officer tests Tiger on the side of the road.

Tiger was found asleep at the wheel of his car before police arrested him on suspicion of driving under the influence in Jupiter, Florida, on Monday. According to the arrest report obtained, officers had to wake up Woods when they found him in his car. The brake lights were on and the right turn signal was flashing as Woods' car was parked in the right lane of Military Trail south of Indian Creek Parkway near Wood's home in Jupiter, Fla.

Tiger's breathalyzer number was 0.0 ... so what was up? The golfer said in a statement following his arrest that prescription meds were to blame -- and it seems like that's the truth. The athlete had fusion back surgery for "excruciating" lower back pain in April. It was his fourth procedure in three years. Almost certainly, doctors prescribed painkillers after the surgery -- and probably before. Could opioids be to blame?