Leona Maguire and Stephanie Meadows have both left themselves with considerable work to do if they want to make the cut at the ANA Inspiration.
Maguire made four bogeys and picked up the solitary stroke as she finished with an opening round of 75, leaving her three adrift of the cut mark in California.
Meanwhile Meadows is a shot further back on four over after an inconsistant round which included six bogeys and two birdies.
Eksewhere Scotland's Catriona Matthew made an impressive start and sits just one shot off the lead after the first round of 2016's first major.
The 46-year-old made headway in the back nine after making the turn on level par as she struck four birdies to card a four-under-par 68.
She was inches away from being level with joint leaders Azahara Munoz and Ai Miyazto on five under as she almost holed a fantastic approach shot at the par 5 18th for an eagle, but had to settle for a birdie.
Spaniard Munoz would have stood alone at the top of the leaderboard had it not been for a bogey on the 18th hole, the only blemish on her otherwise impressive card, while Miyazto did go round without bogeying.
England's Charley Hull finished with back-to-back birdies to card a two-under 70, the same score which world number one Lydia Ko and Michelle Wie recorded.
Miyazto told LPGA.com: “Today I hit the ball well and my putting was really good. I had good control and was happy that I played well. I had a good start and in the middle of the round, I started hitting it everywhere, but I had some good up and downs. I enjoyed every moment. There is tonnes of golf left, I just need to keep it going.”
