Three-time Olympic gold medalist
It was only the second loss in 18 matches for Walsh Jennings and Ross, who paired up this season after Walsh Jennings' partner in all three of her Olympic-winning performances,
Fendrick and Hochevar will play fourth-seeded Jennifer Fopma and Brook Sweat in the final later Sunday afternoon.
Fopma and Sweat upset second-seeded Emily Day and Summer Ross, 18-21, 21-11, 15-13, in the other semifinal.
Had the 35-year-old Walsh Jennings won the tournament, she would have become the winningest woman in beach volleyball with 113 tournament victories.
Walsh Jennings is tied with May-Treanor.