League sponsors Sky Bet have Rovers priced at 8/15 to beat Grimsby Town in the Checkatrade Trophy.
Mallik Wilks could come up against his former club when the Mariners visit, and he is priced at 9/2 to be the first goalscorer in the second game in Group G.
The draw after 90 minutes is priced at 11/4, with a Mariners victory priced at 4/1.