He is currently on US$197,836 (NZD$250,473) for the season and needs to win at least once to overtake American Michael Putnam US$430,684 (NZD$545,254) and claim the coveted No.1 place on the money-list.
The 21-year-old Lee is two places back in 11th place and is looking to return to the PGA Tour after losing his card in 2012. He missed qualifying for the PGA Tour at the final stage of Q School by one shot at the end of last year.
The top 25 players on the order of merit at the end of the season, on September 29 at the Web.com Tour Championship, automatically qualify for the PGA Tour.
Web.com Tour officials have reported that Wilkinson and Lee have already done enough to qualify with eight events remaining on the 2013 season (including this week).
Hamilton pro Steven Alker, who won three weeks ago at the Utah Championship to turn his season around, is in a fight for his PGA Tour card.
The 41-year-old, who finished tied 40th at the Albertsons Boise last week and remained in 21st place on the money-list, is not playing this week in Pennsylvania.
The former New Zealand PGA champion needs a strong finish to the season to join Lee and Wilkinson and the world's elite on the game's most lucrative tour.
If all three Kiwis can progress to the PGA Tour it will be a return to the heydays of New Zealand Golf.
In 2002 New Zealand golf had its largest ever presence on the PGA Tour when they had five players (Craig Perks, Frank Nobilo, Phil Tataurangi, Grant Waite and Michael Long) will full playing rights.