Cricket's unluckiest commentator has copped another one in the box with a massive six sending him diving for cover as it smashed into his commentary position.

Edward Bevan was calling a match for BBC Radio Wales at Taunton, south-west England, when Somerset batsman Peter Trego went the tonk against Glamorgan.

"Trego comes down and hits it up towards us, and ... is it going to hit us?" Bevan says, moments before glass can be heard shattering and laughter erupts in the background.

Remarkably, it was the third such incident in the veteran commentator's career, but this one left him a little more shaken than the others.

He suffered a blow to the lower back, and was forced to retire hurt for the game.

Afterwards, Bevan said he thought the box was made of perspex and labelled it the "worst commentary box in the country".

"It's the third time it's happened now - twice in the little box we used to have in Cardiff, not the palatial building we have now, and yesterday of course, which is probably the worst commentary box in the country," he told the BBC.

"There's a bruise there this morning - in fact I couldn't carry on.

"Dear old Steve James [Bevan's fellow commentator] carried on for about a quarter of an hour."

Bevan also paid tribute to the batsman, who apparently punched the air in celebration when he realised he had hit the box.

Trego went on to score a century in a "magnificent" innings.

- Sydney Morning Herald