"As soon as he said my name on the first tee, I could barely take my hands out of my pocket", Curry said.
According to Marcus Thompson of The Athletic, Curry was incredibly nervous before taking his tee shot.
Curry said he'd heard about the Nicklaus message but hadn't seen it.
"I think he certainly beat most everybody's expectations but I don't think that really surprised him", fellow Under Armour athlete Spieth said.
Curry had a rough start Friday, posting bogeys on four of the first eight holes, but settled down to par the next five before getting up and down out of a bunker for birdie on No. 14.
"I think it's pretty special for a two-time MVP to be able to shoot 74 at a pro event and beat other pros", said major victor Jason Day.
"I want to play better tomorrow and now I've got the jitters out hopefully that will happen", he said.
Through the first nine holes, it looked like Curry's second day might be a bit of a wet dud after his impressive first day.
The good news for Curry is that he was close to saving par after hitting a very good chip shot that nearly made it to the hole.
Before the tournament, Steve Wheatcroft, a PGA Tour pro, wrote on Twitter that there was "no way in hell" that Curry would shoot below 76.
Wherever he went on Thursday, there were cameras clicking, cheers and whistles moments after he struck the ball and hundreds of supporters wearing Warriors gear, mostly shirts bearing his No. 30. It was almost impossible for him to lose a ball. One of the biggest bargains in the National Basketball Association before, Curry was rewarded last month with a $201 million, five-year contract.
Curry's opening 74 was one shot better than one of his playing partners.
On this day, it was Jaeger making a key assist down the stretch.