On the second day of the 2012 British Open, Luke Donald decided to switch up his caddy when he gave regular bag master John McLaren the day off in exchange for Robert Karlsson's side-man, Gareth Lord.
The result was a 68 on day two, which was a two-stroke improvement from day one.
While the results were a welcome benefit, Donald didn't change things up because he felt Lord was more qualified; Donald changed things up because McLaren was excused in order to be present for the birth of his first child.
Via SB Nation:
"For me that was an important thing in my life to be around for [the birth of a child], especially your first one, and enjoy that experience," Donald said. "But I know what he's like. He's very passionate about his job, as well, and he'll get back here when he's ready."