Among those chasing the leaders is Nicolas Colsaerts, currently T-7 in his bid to make the European Ryder Cup team for the first time.
Colsaerts fired a 2-under 70 on Friday and is three shots behind the leaders heading into the weekend. The Belgian will need a top-two finish this week at Gleneagles to qualify automatically for next month's matches.
Despite a second-round 69, European Ryder Cup captain Jose Maria Olazabal missed the cut by three strokes and will now have ample opportunity to size up Colsaerts this weekend for a potential captain's pick. The Spaniard will have two selections with which to fill out his team after the top 10 automatic qualifiers are finalized this week.
Several golfers are tied at -4, four shots behind Foster and Finch, including former Ryder Cup captain Colin Montgomerie and Francesco Molinari, who will be making his second Ryder Cup appearance at Medinah.
The round of the day on Friday belonged to Frenchman Gregory Bourdy, who is now T-5 and two shots behind the leaders after shooting a second-round 66 that included eight birdies.