Most golfers caddies are exceptional golfers in their own right. Unfortunately for Jordan Spieth's bag man, Michael Greller, he doesn't appear to be one of them, if this video filmed earlier this week at Pebble Beach is anything to go by.

The former maths teacher wasn't picked for his golfing skills. Greller first met Jordan Spieth in 2011 carrying his bag at the 2011 U.S. Junior Amateur at Gold Mountain in Washington state. Spieth won the tournament and got Greller back on board when the golfer played in the 2012 U.S. Open.

“We understand each other well," said Jordan. "It is really more him understanding me, knowing when is the right time to step in and say something, knowing when is the right time to back off, knowing how to judge the wind, knowing what shots I’m thinking about playing. We have had a lot of rounds under our belt now and we get better and better each week, I think.”

What Greller definitely doesn't understand is the golf swing if this shot is anything to go by.

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