Aubrey "Postman" Modiba (born July 22, 1995 in Polokwane, Limpopo) is a South African football player who plays as a left-winger and left-back for Cape Town City in the Premier Soccer League. He has played for the South Africa national under-20 football team and currently represents the national U23 team. He is a former Mpumalanga Black Aces player, where he played his first two Premier Soccer League seasons.
Modiba began his professional football career at 19 years old representing Mpumalanga Black Aces in the 2014/15 PSL season. He managed only 1 appearance in his opening season, but grew to strength quickly earning himself 25 appearances in only his second season. In 2016 he was signed by Cape Town City after the relocation of Aces.
Modiba currently plays for the South Africa national U23 team as a midfielder. He has earned 6 caps at the U23 level and 17 with the U20 team.
In 2016, Modiba was selected to represent South Africa at the 2016 Summer Olympics in Rio de Janeiro. He featured in every one of the team's three games, starting in midfield for two out of three.