Matt Maynard makes one change to the squad that travelled to Taunton, ahead of Glamorgan's Vitality Blast clash at Edgbaston against Northamptonshire.
Graham Wagg recovered in time to feature against Somerset, and is recalled to the full squad, while Ruaidhri Smith has also recovered from his hamstring strain suffered at Taunton in the Bob Willis Trophy to make his first squad of the Vitality Blast.
Maynard confirmed after the defeat against Somerset that Nick Selman would come into the side, and Selman said he was excited for the opportunity to get in the side and see what he can do.
"It's exciting to get the call-up. I've been working hard on my T20 game over the last 18 months and I felt like I played well towards the end of last season, so I'm hoping I can carry on that form tonight.
"Playing on Sky Sports adds that extra buzz, and our fielding has been full of energy so far so if we can keep that up then that can only help us get that win."
With the side suffering back-to-back defeats after beating Gloucestershire on Saturday, Selman believes his side have the ability to 'turn things around' and reverse momentum ahead of the break and remaining games.
"Cooky's been great and the spinners have fired too, and we know that in the rest of the team we can contribute more, and we fully believe we can do so.
"It's a good chance to build some momentum heading into Sunday's Bob Willis Trophy game and then the last five games of the tournament, and it's too early in the competition to be writing anyone off yet.
"This group has so far shown anyone can beat anyone and we'll be going to Edgbaston tonight backing ourselves to turn things around."