The 27-year-old right-handed batsman scored 131 for his second one-day hundred and added 126 for the second wicket with Martin Guptill (62) after the Black Caps won the toss and decided to bat in a must-win match. New Zealand, who lost the first match by 138 runs to trail 0-1 in the three-match series, had McCullum to thank for salvaging the innings after Aaron Redmond (six) fell in the sixth over