He stayed in contention through the front nine on Sunday and took the lead through 12 holes .
Mickelson was just a shot off Payne Stewart 's lead going into the final round at Pinehurst .
Mickelson stayed in contention through the front nine on Sunday and took the lead through 12 holes .
Mickelson was just a shot off Payne Stewart 's lead going into the final round at Pinehurst .