Doncaster manager Sean O`Driscoll is hoping to bring in all four of his current trialists on permanent deals after they again impressed him in the 1-1 draw with Wolves.
Rovers rounded off their pre-season campaign by taking the lead against Mick McCarthy`s Premier League new-boys in Mickey Walker`s testimonial through Mark Wilson, but Matt Jarvis levelled for the visitors.
Wingers John Oster and Quinton Fortune played in the game along with defensive duo Byron Webster and Mustapha Dumbaya as they look to earn contracts at the Keepmoat Stadium, and O`Driscoll has been pleased with all four.
"They wouldn't be on the pitch if they weren`t in the frame," he told the club`s official website. "Whether we do anything is down to the other complicated things in football.
"We`ve been really pleased with the way they have fitted in and their good characters.
"If you say that they are on trial, then they have passed their trial with flying colours."
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