Rahm finished two rounds at even par and will not make the cut at Valhalla Golf Club.
Rockford Lutheran graduate Jeff Kellen, the head pro at North Shore Country Club, recovered from a rough first day in the PGA to shoot 72 in 2nd round
Rising star Atthaya Thitikul birdied five of the final seven holes in a round of 7-under 65.
LPGA officials are concerned about health issues at the Mizuho Americas Open.