Southend United boss Paul Sturrock has said he has a dilemma up front, with three strikers out injured.
against Hereford with ankle and knee injuries respectively.
Liam Dickinson is struggling for match fitness, leaving Bilel Mohsni and Neil Harris as the only fit options.
"The competition for places is going to be through the young boys, Mohsni and Liam and Harris," he told BBC Essex.
"It will be two or three weeks until Blair's available.
"Barry Corr's probably a tad behind him, but Barry plays the game a bit differently from other people, he's a big boy targetman.
"He wouldn't expend as much energy as others, last year he had no pre-season and came in the first game."
New signing Dickinson could find himself on the bench, despite fears he would be ruled out for the visit of the Bulls.
"Liam is in the half-and-half position, he's done a bit of pre-season, a bit of running and not done enough yet," said Sturrock.
"It's a difficult one to make a decision on him, he might be thrown on the bench to give us cover."
With six new signings through the doors at Roots Hall, Sturrock is urging optimism and caution ahead of the new campaign.
"The rest of the teams have not been sitting on their thumbs, if you look at the turnover of players through the division this year it's quite incredible," he said.
"I'm very confident we have progressed as a squad, I'm confident that with the players we've brought in we're going to be a better team and I'm very confident we'll be in the right area of the league most of the season."