The warm-up games help them prepare for the big kick-off, which this season is August 5.
They also help clubs look at potential signings, with side’s more often welcoming triallists into their ranks in order to have a closer look at them.
But while the Blues haven’t gone down that route yet under John Mousinho, others in the division have.
Here’s who’s looking at bolstering their ranks with some unattached bargains and the results they’ve picked up so far this summer.
9. Charlton Athletic
Games played: W 4-0 v Welling United, W 2-1 v Dartford, D 1-1 v Leyton Orient. Triallists used: 1 (v Welling - Chris Francis), 1 (v Leyton Orient - goalkeeper, unknown). Photo: George Wood
10. Cheltenham
Games played: W 4-2 v Evesham, W 6-0 v Swindon Supermarine Triallists used: 1 (Liam Smith v Swindon Supermarine). Photo: Steve Welsh
11. Derby County
Games played: W 2-0 v Matlock Town. Triallists used: 0. Photo: Michael Regan
12. Exeter City
Games played: W 1-0 v Tiverton, W 8-0 v Mousehole. Triallists used: 4 (Julien Dacosta, Reece Cole, Lewis Spence and Brad young). Photo: Marc Atkins