Chris Powell's side suffered their third defeat of pre-season at a sodden Oakwell despite Nahki Wells' opener
Wells booked his place in the starting line-up against Hull, but who will join him in Huddersfield Town's blue and white stripes remains a burning question after a frustrating 2-1 defeat at Barnsley.
Wells fired his side ahead on 20 minutes with a cracker, but a mistake by Kyle Dempsey gifted Sam Winnall a 33rd minute equalizer for Lee Johnson's League One side.
Chris Powell then watched a mix-up at a corner two minutes into the second half present Mason Holgate with a winner.