There's also a difference in caddies. And in Gneiser's experience.
"I do know that deep down, he's been under the gun a bunch of times with [Toms] and [caddied] in some Ryder Cups and Presidents Cups," Haas said. "He's seen a lot more pressure-packed situations than a lot of caddies. ... I don't think he can do anything but help me and I just like him."
Haas led after the first round of the Houston Open last week -- where he and Gneiser first worked together -- and finished T-37. He has two top 10 finishes this season, but that's about it for magic moments. In other words, his 1-stroke lead after 18 holes on Thursday over Adam Scott, Louis Oosthuizen and Bubba Watson -- all of whom have won majors -- is written in pencil, not ink.
"I know there's tons of golf left," Haas said. "And maybe understanding that, I know that I can't expect too much."
So far, this is the father-son Masters. Two shots behind Haas is Kevin Stadler, whose father, Craig, won the 1982 Masters. Kevin shot 70, 12 strokes better than his dad.
Meanwhile, the Family Haas roots for Bill. Jay Sr. is spending time with Bill on the range. As for Jay Jr., well, here's guessing blood is thicker than pink slips.