According to
http://www.leedsunited.com/article.asp?article=276466&blnFeedback=0&Title=Pre-Season+Fixtures+Announced&navlid=newsroom Leeds United are set to visit Oakwell on the 30th July in a Pre-Season friendly.This has not as yet been confirmed by the Barnsley Official Site, but if true it could see as many as 4 players renewing acquaintances
Current Reds employees, Boss Andy Ritchie, Stephen McPhail and Jacob Burns all have past Leeds connections whilst Leeds youngster Simon Johnson spent the last few months of 2004/2005 on loan at Oakwell.