Darren Clarke and Colin Montgomerie are battling for the lead in the Deutsche Bank Open.
Clarke leads at 10 under par after 13 holes of his second round.
Overnight leader Alex Cejka was only one behind, and Montgomerie is joint third with Greg Turner.
Both of them eagled the 603-yard 17 but Clarke then added birdies on the first, third and fourth after switching to the front nine.
Clarke and Montgomerie were level when the former bogeyed the fifth and the latter holed from nearly 30 feet at the 536-yard third.
But Cejka was back ahead of both of them when he birdied the third and fifth to move to 10 under.
Former Open champions Nick Faldo and John Daly were both fighting to survive the halfway cut.
It was expected to fall at level par and both turned at two over, Daly after double-bogeying the short 13th.
Faldo, partnering Montgomerie, then picked up one of the two strokes he probably needed to qualify, two-putting the 540-yard first - his 10th - for birdie.