Score are mainly guesses.
2009/10 = 3 off 10, DNB, 1 catch = 13
2011/12 = 35 off 35, 4-0-25-0, = 51
2013/14 = 57 off 35, 1-0-17-0, = 83
2015/16 = 1 off 2, 2-0-16-0, 1 catch = 14
2016/17 = 31 off 19, 1-0-11-0, 1 catch = 67
2017/18 = 3 off 5, 4-0-53-0, 1 catch = 17
2018??? = 3 off 5, DNB, = 3
2019??? = 32 off 33, DNB, = 32
2020??? = 17 off 18, DNB, 1 catch = 27
It looks like Marsh averages around 34 in game of the BBL.