At Bay Hill, Jason Day conjures up comparisons of stellar 2015 run

Consistent Day goes low again at Bay Hill (1:29)

What did Jason Day do better in Round 2 than Round 1? He spoke to ESPN.com's Michael Collins on Friday at the Arnold Palmer Invitational. (1:29)

ORLANDO, Fla. -- Every major champion says it upon winning. No, insists it.

"This won't change me."

It rarely remains true.

Even if reaching the sport's pinnacle doesn't impact a golfer's innate personality, it does change his life. He becomes more recognized in public, has more demands on his time, finds more sponsors vying for his attention. Inside the ropes, it can lead to greater confidence or a sense of unfulfilled expectations.

The aftermath can be endlessly positive, devastatingly negative or -- most often -- some mixture of the two, not that anyone would ever choose to give back the trophy.

Jason Day won the most recent major title, last year's PGA Championship, but has remained constant on that original insistence. In the seven months since that victory, he maintains that he hasn't changed at all.

"Life has not changed for me," he said recently. "I'm still the same boring person as I was before I won a major."

Despite a sluggish start to the season, Day has looked like the same person so far this week -- or same golfer, at least -- as the one who prevailed five times last year, posting rounds of 66 and 65 at the Arnold Palmer Invitational to grab sole possession of the lead heading into Saturday.

His play thus far has looked reminiscent to that of late last summer, when at one point he triumphed in four of six starts. At his best, Day is a world-beater who can quickly climb a leaderboard and never relinquish his position.

All of which leads us back to that major.

Day hasn't just insisted that claiming the Wanamaker Trophy hasn't changed him. He's gone into great detail to explain exactly how he hasn't been affected.

"I always thought when, if I ever had the opportunity to win a major championship and get to No. 1 in the world, that there would be this sense of clarity, that it would be like, 'Oh, I've done what I need to do; everything's great,'" he said. "Unfortunately, it never really happened. There was none of that at all.

"I woke up the next day, I'm like, 'Oh, this is just another day.' I mean, it just didn't really feel like anything. It was amazing."

These words could be taken as a negative. They sound eerily similar to those of David Duval, who likewise won a major and reached No. 1 in the world, only to famously and precipitously see his game decline in following years.

Day doesn't see it that way, though.

He views his sameness as an advantage. He believes that if everything about him, personally and professionally, still resembles last year, then he should be able to replicate those achievements.

"The ultimate goal this year, I guess, is to try and get back there," he explained. "I hate playing bad golf, I really do. That's why I work really hard."

That sounds like the tagline to one of his commercials, but it also explains his motivation to return to that performance level again.

In two rounds this week, Day has posted an astounding 15 red numbers on his scorecard.

It appears that, once again, everyone else in the field will be chasing him all weekend.

"Obviously, I have to be patient out there, but I always talk about being patient and aggressive," he said. "Instead of just going, 'OK, this is kind of the score I want to shoot,' I've got to keep trying to extend that lead, trying to get more birdies and more birdies and more birdies.

"The moment you go, 'OK, I've got to my average tournament winning score, which is 13, 14, I can just kind of coast it.' You can't coast it in."

All of these are the same philosophies which have led him to success in the past.

Like so many other major champions before him, Day takes pride in the fact that winning one hasn't changed him. Now he's trying to prove that the end result is something opposite of complacency. He's trying to show that a failure to change as a golfer only provides more fuel for motivation to find greater success.

So far this week, it's working.

With two more rounds like the first two, Day will be lapping the field and receiving a congratulatory handshake from Arnold Palmer on Sunday afternoon.

There's no guarantee with it, of course. Only this: If it does happen, don't expect it to change him.