Rose moved into contention with a fine all-round display
England's Justin Rose boosted his Ryder Cup prospects as he moved to within a shot of the lead after round two of the USPGA Championship at Oakland Hills.
Rose, who lies in the 10th and final automatic Cup qualifying spot, shot a three-under par 67 to challenge overnight leader JB Holmes.
But Scot Colin Montgomerie reacted angrily as he carded a 14-over 84, matching his worst round in a major.
"Make that your last laugh," he told a reporter who chuckled at an answer.
Rose, 28, defied breezy conditions and fast, sloping greens to charge into contention with his best display of the season.
"I knew this week was key to the Ryder Cup," he said.
"There are two days to go but the key for me to play good golf is to not get ahead of myself and think about Ryder Cup.
"Today I was really in the moment, playing one shot at a time, and that's clearly my goal for the weekend. A good performance here really helps out with the Ryder Cup."
Montgomerie is trying to play his way onto his eighth straight European Ryder Cup team, but his only hope may now be a wildcard pick by captain Nick Faldo.
A 20-over 160 total meant he missed the cut by more than 10 shots and had him in front of only five players, all USPGA club professionals.
Montgomerie endured a dismal round at Oakland Hills
"It was very difficult, obviously, but I made it more so," he said after making just two pars in his first 11 holes. "I got off to a bad start and, unfortunately, I kept it going."
The 45-year-old played a key role in Europe's rout over the United States in the 2004 Ryder Cup at Oakland Hills, but said he barely recognises the course after it was redesigned for the USPGA tournament.
"This is nothing like the place that we came to four years ago," he said.
Montgomerie claimed he was not thinking about the Ryder Cup during his disastrous round, but turned on a reporter who suggested his place might be in danger.
"I'm not on the team, am I?" he asked, while walking away. "Sorry, I didn't think you looked like (European captain) Nick Faldo."