What brand of golf ball was hit on the moon?

There are probably two Golf balls on the Moon, not three.

Alan Shepard brought two golf balls along on Apollo 14, which he hit on February 6, 1971, becoming the first golfer on the Moon. On the Moon, almost all shots will be from a sand trap.

Although many sources mistakenly say three, the answer is two. The source of confusion comes from the fact that Shepard swung four times. If you watch the video and listen to the transcript, you'll see that the first swing moved the ball a few feet, the second swing missed the ball, the third swing hit it far. Then he dropped the second ball, and the fourth swing sent that one far also. It's the second and third swings that can be the source of confusion - they were swings at the same ball. The video is kind of fuzzy so it's hard to tell, but it's obvious from the mission transcript. (see the related link below).

In addition Shepard himself said "two golf balls" in a 1991 interview, although there is a video with a description that incorrectly says "three golf balls."

It is difficult to analyze the video or interviews and draw conclusions either way, since he could have only referred to the "couple" of balls in the interview he actually hit versus how many were placed on the surface of the Moon, perhaps two balls at one time. The grainly TV video serves no more to prove either way if there are two or three balls on the surface. In no interview does Shepard state how many balls were taken on the mission or how many were dropped on the surface where two could have been dropped at the same time. While there were very likely only two balls, the popular conception is that there were three.

(see all three related links below)