Hugh Murray and Colin Nish are included in the Dumbarton squad that will take on Morton.
Murray has joined the club on loan from Partick Thistle and manager Ian Murray has brought in his former Hibernian team-mate Nish.
Nicky Phinn is a doubt with boss Murray looking for an improvement from his players after last Saturday's 4-1 defeat at Hamilton.
He said: "That was a terrible performance and we know that we are capable of a whole lot better.
"We are looking to bounce back from it against Morton but it will not be easy as they will feel much the same after losing to Falkirk last weekend."
Morton midfielder Joe McKee, a summer signing from Bolton, misses out at the Bet Butler Stadium due to an ankle injury but the Greenock side do have striker Kabba-Modou Cham available after a hip problem.
Visiting manager Allan Moore has urged his men to cut silly errors out of their game.
"We started well at Falkirk but lost the match as we gave away crazy goals through mistakes,`` said Moore. ``If we ensure that we concentrate fully for the 90 minutes we can win at Dumbarton.
"Like us they will be hurting after a defeat but we are aiming to bounce back higher than they do."