Bill's ability was shown during the 1970-71 final series when he scored 42 in each match. The team was in trouble in the grand final when five of the top order had contributed just 13 runs between them, but coming in at seven, Bill steadied his side and it passed Bomaderry’s 139 with two wickets in hand. The South Coast Register reported that “Bill Kerr has never played a finer innings, and restrained as it was, it was an innings that will be remembered by his team for many years to come.”