Connolly (left) and Casey have agreed to stop working together

Casey had been with Craig Connolly for three years but said the pair agreed to go their separate ways after his 10th-place finish at the US Open.

"We've probably been getting at each other and it's best to keep your sanity," said the British world No 16.

"We were friends before we were working together so to save the friendship it's probably best to take away the golf."

Casey made the announcement on the eve of the BMW International Open in Munich, where his bag carrier will be Irishman John Mulrooney.

"Watch this space - but John knows it's just this week for him," he said.

Casey and Connolly have had temporary breaks before, and Casey said the change benefited his game, so he was hopeful the same thing might happen again.

"Last time it was good because I had a few weeks using other guys and then we came back and played some great golf."

There had been reports Connolly may team up with Montgomerie but the Scotsman's manager Guy Kinnings said this was news to him.

"It will be somebody temporary this week, then we will sit down and discuss things on Monday," he said.

"I've been inundated by texts, emails and phone calls and after weeding out the enthusiastic, but inappropriate people off the street I've got a list of about 30 professional caddies offering their services."