The first was for a double bogey, and the second for bogey. "I missed two greens", said the 23-year-old, who won the Masters and US Open in 2015.
Australian Peter Thomson won his first Open title at Birkdale in 1954 and his fifth and final back here in 1965.
"To go out there and post a red number on the board on a good, strong golf course always feels great, " said Poulter, who was runner-up to Padraig Harrington at the 2008 Open, the last time the tournament was played at Royal Birkdale. So I try to feed positively off of that.
Sky is the only UK TV channel that will be airing this year's Open Championship live, having acquired the rights to the prestigious major from the BBC in 2016.
Following Bubba Watson down the back nine, "Bones" told a fantastic story about the time a college-aged Watson took on Mickelson in the late '90s, long before the two had ever donned a green jacket. There are a few tricks here and there that you can apply to golf. They did their part, I just couldn't quite do mine. I like this kind of golf.
"The other hard thing I've done is obviously not playing the Ryder Cup and being a vice-captain". "I don't want to say that if I don't win this, it's going to be a huge sort of hole in my career". But there is going to be a little bit more pressure on him, because he is a hometown boy and he is playing well.
"(I've) just got to be patient with myself and understand that it's been a while since I've been in a position to contend other than the Byron Nelson this year.
"I thought today's round was extremely important, as they all are, but given the forecast coming in, I thought you really needed to be in the red today", added Spieth, who effectively saw his hopes go up in smoke in the second round a year ago at Troon. "So it hasn't really sunk in, I don't think yet". But I didn't come here to dress well.
"I don't mind working on my birthday", said Casey.
World number three Jordan Spieth, who tees off at 9:47am alongside Stenson and South Korea's Kim Si-Woo, is in good shape.
" ... If I start playing four or five weeks in a row, everything just seems to get nonchalant". Returning now as a top-10 golfer should do a lot for his chances. I have watched to see how they played the course, there's bits and pieces they might have changed since then but it gives you an idea of the feeling coming down the last few holes in contention. "And he kind of ended up being nearly as a father figure to me in the States, which is very nice, because my parents were all the way in Spain".
"It's even more fun to get inside the ropes and play golf here".
The Claret Jug is there for the taking.