(CNN) -- A second consecutive round of 66 fired Paul Casey to the top of the Memorial Tournament leaderboard in Dublin, Ohio, Friday after overnight leader Rory McIlroy fell away. 

Casey shot six birdies and an eagle, which more than canceled out bogies on holes nine and 17, to finish the day on 12-under-par. 

The Englishman now sits three shots ahead of Masters champion Bubba Watson going into the weekend. 

"I had very good control of the irons today," Casey told the PGA Tour website upon reaching the clubhouse. 

"The driving was still good again but I was ecstatic with the way I played. There was a couple of mistakes in there. But that's Muirfield Village. It's a tricky golf course and you don't need to do a lot wrong to make a mistake." 

McIlroy had led by three strokes after Thursday's stunning 63 but fell way back to tie for 24th position at the end of day thanks to second round 78 that included three bogeys and three double-bogeys. 

The 25-year-old Northern Irishman, who picked up the European PGA title at Wentworth last weekend, had complained of a knee problem after his first round but refused to blame injury for his poor showing. 

"I felt it a little bit, but didn't really bother me too much," he said. 

"Hopefully that's the bad run out of the way and I can play some good golf on the weekend and get myself back in with the shots," he added. 

Elsewhere on the course, a 70 for Chris Kirk ensured he kept up the pressure on second-placed Watson, lying one shot back at eight-under-par.  QUESTIONS:

Q1:
1. What sport is at the center of the CNN article?
2. What athletic activity appears in the CNN ARTICLE?
3. 
Q2:
1. What professional golf tour does the article discuss?
2. Which professional golf tour appears in the article?
3. 
Q3:
1. Who received the European PGA title last weekend?
2. What was the name of the European PGA winner from last weekend?
3. 
Q4:
1. What tournament did Paul Casey win in Ohio?
2. What was the name of the tournament that Paul Casey won in Ohio?
3. 
Q5:
1. What city was the Memorial Tournament held?
2. Which metropolis hosted the Memorial Tournament?
3. 
Q6:
1. Who did Paul Casey beat to win the Memorial Tournament?
2. Which golfer lost to Paul Casey in the Memorial Tournament?
3. 
Q7:
1. How far under par was Paul Casey?
2. What was Paul Casey's below par score?
3. 
Q8:
1. What is Rory McIlroy's country of residence?
2. Where does Rory McIlroy reside?
3. 
Q9:
1. Which golfer came in second place?
2. Who finished second in the golf tournament?
3. 
Q10:
1. What is the name of the Dublin golf course?
2. Which golf course can be found in Dublin?
3. 
Q11:
1. What was the name of the third place winner?
2. Who finished third?
3. 
Q12:
1. What was Paul Casey's country of residence?
2. What country did Paul Casey come from?
3. 
Q13:
1. What is the location of the European PGA Tournament?
2. In what location is the European PGA Tournament played?
3. 
