As the eight teams prepare to complete their squads, who are the leading contenders for selection?
1 (5) - Jordan Thompson: A lean week with the ball but having claimed 11 wickets in this competition, his recent batting exploits will have caught the attention. Coming in at No.3 for Yorkshire he struck 74 from 35 balls, and then picked up Saif Zaib in the chase against Northamptonshire. A strike rate of 200 is the most of any player with more than 25 Blast runs.
2 (-) - Stephen Eskinazi: Not been consistent across the whole campaign but there is no doubt he is coming in hot. Scores of 102*, 64 and 91* in a week ensure he is the form player in the country with the bat. The risk is perhaps that there are another three weeks until the opening game.
3 (-) - Scott Steel: A consistent scorer and an economic bowler is just the combination Blast teams will be looking at. The 22-year-old has scored in excess of 300 runs, while his 18.2 overs have gone at just over a run-a-ball (6.21).
4 (8) - George Scrimshaw: No eligible player has more Blast wickets than the Derbyshire paceman. Bowls primarily in those key middle overs and at the death, consistently picking up breakthroughs and bowling tight. Has collected at least three wickets in an innings on three occasions..
5 (11) - Fynn Hudson-Prentice: Another Falcons quick with 14 wickets to their name. Added to that tally with an encouraging performance against Birmingham Bears, getting Sam Hain amid a two-over spell that included five dots. Scores his runs at 130 this year, when given the opportunity, too.

Arron Lilley produced one of the innings of the week
6 (3) - Sam Hain: A very lean week for the Bears batter, who made a duck and then two against Derbyshire and Durham before being denied the chance to chase in thrashing of Yorkshire. Nevertheless, his 288 runs at 48 (strike-rate 142.57) and the stylish manner he can build an innings means it will be no surprise to see him given a deal.
7 (4) - Matt Milnes: Claimed two vital scalps in the DLS win over Essex to give him 13 wickets for Kent at 17.30 apiece. Another whose economy rate might come back to bite him but there is no doubting how effective he is with the new ball.
8 (7) - Will Rhodes: Produced one of the stand-out performances of the week for Bears, taking 2 for 11 and scoring 45, albeit in defeat to Durham as the chase failed. Will be waiting nervously by the phone.
9 (1) - Sam Cook: A somewhat sobering week after his seven overs went for 72. Didn't go to plan against Kent but did pick up two wickets in a winning cause against Somerset. On a downward trajectory but you can't ignore the form he showed in the opening rounds.
10 (-) - Ricardo Vasconcelos: Has benefitted from Northants playing four times in the last week and enjoying an upturn in form. Vasconcelos has propelled himself up the run-scoring charts with knocks of 41, 16, 30 and 60, while he also had a spell behind the stumps. The one concern might be a strike rate of 118.81, which may put a few off.
11 (-) - Graeme White: Produced the best bowling figures of the week from players available for a wildcard for Northamptonshire, taking 4-26 in victory over Durham. His left-arm offies captured Cameron Bancroft and Ben Raine among others. Among a host of spinners who are in contention.
12 (-) - Arron Lilley: Not a vintage tournament or a complete week for the 30-year-old, but you can't dismiss his unbeaten 99 against Yorkshire. His 55 deliveries went for nine fours and four sixes. Fair to say that otherwise, it has been a lean campaign.
13 (-) - Brett D'Oliveira: A season bookended by some strong performances, but they have been few and far between. Hit 67 and 69 against Durham and Leicestershire in successive matches and when called upon he has been impressive with the ball. The leggie has the lowest economy rate of anyone to bowl at least seven overs (5.42) but that comes from a small sample size - his career rate is closer to eight.