Mariner had named the same starting line-up for the past two matches, his first two wins in charge coming with a 1-0 success at Cardiff last Saturday before a 4-1 rout of Reading at Home Park on Monday.
Central defender Reda Johnson - paired with impressive Iceland international Kari Arnason for both games - is unavailable as he is on African Nations Cup duty with Benin.
With Dutch defender Marcel Seip having joined Sheffield United on loan, Mariner can select from fit-again Chris Barker and Hungary international Krisztian Timar or switch left-back Gary Sawyer to centre-half.
