Bristol Rovers boss Ian Atkins was impressed with trialists Marc Richards and Shaun Marshall in their 3-2 friendly win at Hereford on Saturday.
Former Northampton striker Richards, 23, and ex-Cambridge keeper Marshall, 26, are both hoping to earn deals.
"Marc is someone I've always rated, and I'm certainly hoping he'll stay with us all week," Atkins told Rovers' website.
"Shaun again coped well with what he had to do, and we'll have to see what develops on that front."
Also on Saturday, a Pirates team composed of youth players and trialists won 4-3 at Bromsgrove Rovers.