Hall's tee shot finished 12m from the hole on the 161m par 3 and his lag putt ran 4m past leading to a bogey 4 and the loss of hole.
Hall posted rounds of 67 and 71 while Borren carded 68 and 70 to tie at 2 under par on 138 for the 36 holes to force the playoff.
Brandon Hodgson (Otago) did his selection hopes no harm when he finished 1 over par for the day to tie for third with local golfer Granville Joynes.
Hall (Greenacres) held the lead at lunch making five birdies in the morning for 67 to be one ahead of Borren.
In sharp contrast, Borren made a horrific start with a double bogey 7 on the second hole followed by a bogey 5 at the third.
But those were to be the only shots dropped to par and Borren tidied up his round with five birdies and 10 pars for 68.
The leading quartet played par golf in the afternoon _ Borren shooting 70 and Hall 71 to tie after the two roundsSungwoo Han (Wakatipu Junior) and Chris Yallop (Arrowtown) posted the best afternoon rounds at 1 under par.
Ryan Shuttleworth (Wanaka) was in good form shooting 72 and 71 to finish fifth while Otago triallists Han on 142, Inia Logan (Wakatipu Junior) on 145, Daniel Elder (Otago) on 150 and Ryan Bellamy (St Clair) on 150 also finished in the top 12.
With the Otago masters team due to be named, Simon Boland (Queenstown) led the over 40 golfers carding 76 and 73 to ensure his selection in the top quintet.
