Strategy

Plans built only from the evidence.

Every line below is a measured split or record from the data, with the sample behind it. Nothing here is a prediction.

JA Duffy, Men's Test

No batting weakness clears the thresholds in this format.

No batting strength clears the thresholds in this format.

Right-handed batters: average of 21.9, 5.7 above their average of 16.3 on all balls bowled (+35%) — allowing for sample size, that change is in the bottom 6% of comparable players (their median change: -2%) — 788 balls bowled.
Sample: 788 balls · high confidence
Right-handed batters: economy of 2.51, 0.13 above their economy of 2.37 on all balls bowled (+6%) — allowing for sample size, that change is in the bottom 17% of comparable players (their median change: -1%) — 788 balls bowled.
Sample: 788 balls · high confidence
New ball (1-20): economy of 2.78, 0.41 above their economy of 2.37 on all balls bowled (+17%) — allowing for sample size, that change is in the bottom 7% of comparable players (their median change: -2%) — 300 balls bowled.
Sample: 300 balls · low confidence
New ball (1-20): strike rate of 75.0, 33.8 above their strike rate of 41.2 on all balls bowled (+82%) — allowing for sample size, that change is in the bottom 12% of comparable players (their median change: +5%) — 300 balls bowled.
Sample: 300 balls · low confidence

Old ball (21-80): strike rate of 29.4, 11.8 below their strike rate of 41.2 on all balls bowled (-29%) — allowing for sample size, that change is in the top 3% of comparable players (their median change: +5%) — 499 balls bowled.
Sample: 499 balls · medium confidence

Not enough balls: splits are shown from 60 balls faced.

Phase
Phase	Balls	Runs	Outs	Avg	SR	Dot %	4s+6s %
Old ball (21-80)	70	51	2	25.50	72.86	68.6%	12.9%

Batter
Batter	Balls	Runs	Wkts	Avg	Econ	Balls/wkt	Dot %	4s+6s %
Right-handed batters	788	329	15	21.93	2.51	52.5	78.8%	4.9%
Left-handed batters	231	74	7	10.57	1.92	33.0	84.4%	3.5%

Phase
Phase	Balls	Runs	Wkts	Avg	Econ	Balls/wkt	Dot %	4s+6s %
Old ball (21-80)	499	185	17	10.88	2.22	29.4	81.4%	4.4%
New ball (1-20)	300	139	4	34.75	2.78	75.0	80.0%	7.0%
Second new ball (81+)	231	83	4	20.75	2.16	57.8	77.9%	2.2%