Crusaders confirm the elder Franks may leave

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James Mortimer     31 Aug 2012     Getty Images

While it is understood that the Highlanders loom as a likely destination, the Blues are out looking to fill their roster, and would likely welcome a versatile prop like the 28-year-old.

It is however that ability to play on both sides of the scrum that has prevented Ben from adding regular game time, despite playing 85 matches for the Crusaders - with younger brother Owen and Wyatt Crockett specialists in their respective positions.

At test level his younger brother and Tony Woodcock have the two starting berths essentially wrapped up.

Blackadder told Newstalk ZB he could see why players wanted to make sure they played as much as possible.

"Where these guys are in their careers, it's probably a good thing for Ben to get a start every week," he said.

"I can understand why he's thinking like that. He's probably going to be on the bench if we don't rotate because he is our third prop."

Blackadder admitted that Ben, a perfect bench option due to his ability to play loosehead and tighthead, would relish starting time.

"He can play both sides, whereas the other two (Owen and Crockett) can't," he said.

"And then in the All Black environment, he's on the bench again. I can understand why a guy wants to get a regular start, and if it's not for the All Blacks, then it's possibly got to be at Super Rugby."