Stuart Clark, Mick Lewis, Mitchell Johnson and Brett Dorey have all made their limited-overs debuts.
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He will be joined by all-rounders Andrew McDonald and Shane Watson, and probably seamer Stuart Clark.
Siddle and Bollinger, meanwhile, will provide pace bowling back-up for Brett Lee, Stuart Clark and Mitchell Johnson.
The Windies were 46-1 at stumps after Brent Parchment was caught by keeper Haddin off Stuart Clark's bowling.
Middlesex and Kent have signed Phillip Hughes and Stuart Clark respectively ahead of the series, starting in July.
Australia's Ashes squad, which will be named on Wednesday, is set to include pacemen Brett Lee and Stuart Clark.
Peter Siddle, Stuart Clark and Watson then shared seven wickets but Mitchell Johnson's problems continued as Northants posted 226-7 declared.
Brett Lee struck in the first over of the Eagles reply and Stuart Clark claimed two wickets in two overs.
As expected there were recalls for pace bowlers Stuart Clark and Brett Lee, who have missed most of the Australian season through injury.
Another Australian Ashes contender, Stuart Clark, was set to join Kent, before that move was halted by his call-up to the Aussie one-day squad.
They join a long list of unsold players, which includes Australian's Phil Jacques and Stuart Clark - both of whom are under an injury cloud.
Stuart Clark was typically economical and took two wickets in the match, but fellow seamers Peter Siddle and Ben Hilfenhaus will be pushing him for a place.
The tour of South Africa has already been hit by injuries to skipper Ricky Ponting (abdominal muscle strain), all-rounder Andrew Symonds (hip flexor strain) and Stuart Clark (rib bruising).
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After that New Zealand offered little resistance as Stuart Clark (4-43) made it three wickets in the space of 15 minutes, Iain O'Brien falling victim to a slower delivery.
This interview was conducted and published before the announcement on 11 April that Stuart Clark had been called into the Australia one-day squad, ruling him out of contention for Kent.
Flynn was bowled by Mitchell Johnson for 29 after helping Taylor add 84 for the fifth wicket and Elliott went to Stuart Clark for nought, giving Clark figures of 3-23.
Stuart Clark made an immediate breakthrough when his first delivery of the day bounced awkwardly and accounted for Aaron Redmond, who was caught by Ricky Ponting at second slip for three.
The big surprise was Ricky Ponting's decision to leave out seamer Stuart Clark, the leading wicket-taker in the 2006-07 Ashes and man of the match in the final Test at Sydney.
Australia's opening bowlers Lee and Stuart Clark were full of confidence in the opening exchanges, hitting a fine length and generating pace and movement off the seam as they probed outside off stump.
Johnston bludgeoned two sixes off Ervine and one off Chris Tremlett in a brutal 36-ball innings as his team recovered from a difficult start created by pressure from Australians Stuart Clark and Shane Warne.
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West Indies enjoyed a good morning session as Chanderpaul and Runako Morton extended their fourth wicket partnership to 128 before Morton, on 67, gave a catch to Stuart Clark at mid-on off leg-spinner Stuart MacGill.
Speaking of the Ashes, there is a slightly more controversial arrival in Australia seamer Stuart Clark, though Kent insist they have done nothing wrong in signing a player who will be playing against England later in the summer.
Sehwag was in his usual bullish form opening the innings for India, punching Stuart Clark through the covers for an early boundary before waving his arm furiously when a spectator walked behind the bowler's arm before the next delivery.
He hit a beautiful cover-drive for four off Stuart Clark but then, attempting to hit an innocuous delivery through midwicket, turned his wrists too soon and the ball caught the back of his bat before being taken comfortably by Matthew Hayden at slip.
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