Kieffer Moore has taken 12 penalties in his career scoring 8.
His previous 2 misses were actually his first 2 career penalties:
- August 2014, for Yeovil versus Gillingham (Stephen Bywater)
- November 2017, for Rotherham versus Shrewsbury (Dean Henderson)
Sods law that he then scores 7 from 7 before missing 2 in 3 when he signs for us
Regarding the 3 players you have listed, Hamer and Davies have never taken a penalty in professional football:
Hamer
Took 1 and scored it for Zwolle u/21s
Davies
Missed one for England u/19s against Belgium in 2016
O'Hare
Missed 2 and scored 1 for Aston Villa u/21s
His only professional penalty was last season against Oxford in the FA Cup:
Burrows
Wasn't on the pitch for the penalty last night, but he has taken 4 penalties and scored all 4. All of them last season.