WA's first-choice spinner Michael Beer will find out today whether he has any further role to play in the Warriors' 2012-13 campaign.
Beer injured the AC joint in a shoulder at training yesterday and the results of scans are expected to determine his immediate future.
"Just a sore shoulder. Will be back in no time," Beer tweeted last night.
The left-arm orthodox, a key plank in the Scorchers qualifying for successive Big Bash League finals, is a candidate for the coming tour of India.
He is likely to be replaced by Australian under-19 tweaker Ashton Agar for WA's Sheffield Shield clash with NSW, starting at Blacktown on Thursday.
Agar will be joined by Wanneroo batsman John Rogers, 25, who played one match for Tasmania, all-rounder Hilton Cartwright and young Willetton paceman Simon Mackin in the 12-man squad.
Mackin, Agar and Cartwright will all be making their shield debuts if selected in the final team.
The last time WA had four new faces was in 1994 when Adam Gilchrist came from NSW for his first game for WA alongside new chums Mike Hussey, Murray Goodwin and Sean Cary.
Wicket-keeper Tom Triffitt was dropped, so Sam Whiteman will take the gloves. Opener Liam Davis will return after recovering from a serious thumb injury.
Travis Birt was also dropped.
Warriors coach Justin Langer said it had been a difficult decision to drop Triffitt, who moved from Tasmania at the start of the season.
Triffitt was also dumped from the Scorchers team for the semi- final and final of the Big Bash League. Novice keeper Hussey took the gloves.
"Tom has had a tough week in terms of selection with BBL finals but I am confident this will be the catalyst for him to become a much stronger and more consistent cricketer," Langer said.
WA are anchored to the bottom of the shield table with just one win from their five matches.Langer said making the shield final was still a possibility but he was not thinking that far ahead.