Houston Open: Jamie Donaldson struggles in third round
|Shell Houston Open third-round leaderboard|
|-11 J Herman (US), J Lovemark (US); -10 H Stenson (Swe), R Henley (US), D Johnson (US) -9 R Castro (US)|
|Selected others: -7 R Fowler (US); -6 J Spieth (US); -5 P Mickelson (US), J Donaldson (Wal); -2 M Laird (Sco)|
Welshman Jamie Donaldson saw his chances of victory at the Houston Open fade after a poor third round.
The 40-year-old Ryder Cup player was three shots off the lead at the halfway stage but a 74 leaves him six shots adrift.
American pair Jim Herman and Jamie Lovemark share the lead on 11 under.
Sweden's Henrik Stenson and Americans Dustin Johnson and Russell Henley are a further shot behind in the last event before the Masters.