I'd say the likeliest reason is pin placements. Many were not particularly challenging today, although I did not see the whole course yesterday. The greens seemed to be rolling as fast as yesterday, and none of the players I walked with today made any comment about them being slower than yesterday. Also, warm temps and light winds were very similar to yesterday.
I expect to see tougher pin placements tomorrow for the final round, which will push scores back up to at least yesterday's average if not higher. The teams that succeed tomorrow will do two things particularly well - keep the ball in the fairway off the tee and keep the ball under the hole on the greens.
Article on gostanford.com gives some context as to how significant the last two days have been https://gostanford.com/news/2021/5/11/wo...ional.aspx
I expect to see tougher pin placements tomorrow for the final round, which will push scores back up to at least yesterday's average if not higher. The teams that succeed tomorrow will do two things particularly well - keep the ball in the fairway off the tee and keep the ball under the hole on the greens.
Article on gostanford.com gives some context as to how significant the last two days have been https://gostanford.com/news/2021/5/11/wo...ional.aspx