New Zealand last week gave a test debut to 30-year-old Andy McKay. Andrew Alderson looks at five bowlers who could replace ageing quicks Chris Martin (35), Daryl Tuffey (32) and Kyle Mills (31).

1 Neil Wagner (Otago)

The 24-year-old is currently the country's Most Valuable Player (MVP) under the rankings system - it's just a shame he's not eligible for the Black Caps until April.

He has 24 wickets so far this season at an average of 12.75, including 10-110 match figures to dismantle Auckland. More significantly, 18 of his wickets have been top-six batsmen.

The left-arm pace bowler comes from a provincial career in South Africa but has said he moved because he wanted to get picked on ability not skin colour or who he knew.

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He has since been at the forefront of the New Zealand bowling ranks over the past three years and will be a potential test saviour if he can keep whizzing deliveries through at more than 140km/h.

Wagner had the chance to play English county cricket for Sussex but ultimately wants to play tests which is why New Zealand won through. He's not a big fan of English sport.

2 Doug Bracewell (Central)

His surname's weight of expectation appears to have been of little burden to the 20-year-old who is entering his third first-class season. Bracewell has represented the New Zealand under-19s with credibility and has edged his way out of the shadow cast by his father, Brendon.

The word in the provinces is that Bracewell is getting a lot closer to the stumps this season, which means he is generating more outswing.

The proof is 10 wickets at 32.50 this season, compared to a career average of 48.16.

He has already been touted as a possible bargain buy for the Indian Premier League, possibly with the Pune Warriors, where former Central Districts coach Dermot Reeve is the new assistant to former Australia coach Geoff Marsh.

3 Ben Wheeler (Central)

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The 19-year-old's name is constantly brought up by anyone who has anything to do with New Zealand age-group cricket.

The left-armer bowls close to the stumps at speeds regularly up around 140km/h.

He presents danger to right and left-handed batsmen because he can swing the ball both ways.

Wheeler has also shown he's not one who merely chips out the tail. Seven wickets in his 9-102 against Wellington recently were top-six batsmen.

That rocketed him into third on the MVP table after two rounds of the Plunket Shield. He now has 17 first-class wickets at an average of 22.11.

Wheeler joined Central Districts for September's Champions' League in South Africa but didn't play.

He played for New Zealand at this year's under-19 World Cup.

4 Trent Boult (Northern)

The left-armer who sometimes goes by the doubly appropriate nickname Lightning was taken to Australia with the Black Caps for the Chappell-Hadlee series in 2009 but played in only the Prime Minister's XI match. Boult was carted around in excess of six runs per over. It was a decision many, including his ND coach Grant Bradburn, felt was premature.

The Wasim Akram fan is still tipped as a player who can give batsmen the hurry-up with deliveries clocked in the mid-140km/h range. But he has had problems with a stress fracture in his back.Last week he sat out ND's Plunket Shield loss to Canterbury because of tenderness.

Last season the 21-year-old took nine Plunket Shield wickets at an average of 26.44 - this year he has eight wickets at 27.75, including a 5-48 to help ND beat Wellington. A promising future still beckons.

5 Adam Milne (Central)

At 18, Milne is a bolter in this mix, considering he has not played first-class cricket this season. The right-armer is described as someone who is not textbook, bowling wide of the crease, but provides a decent rhythm and a heavy ball that hits the bat after seemingly little effort.

Milne played three first-class games last season taking 11 wickets at 27.54 but is fighting for a spot among the likes of Michael Mason, Mitchell McClenaghan, Bracewell and Wheeler. Milne took a couple of wickets at the Champions' League, which prompted CD's new bowling adviser Shane Bond to take notice - he says Milne is the quickest of the current crop.