Grimes, the 1998 winner at Champions Golf Club, got off to a quick start in the final match with a par at the opening hole and a birdie at the par-3 second to take a 2-up lead. Weworski clawed back, however, with par at the third and a birdie at the par-3 fourth to square the match.
The duo battled tightly over the next few holes until a bogey by Grimes at the par-3 eighth gave Weworski a 1-up advantage. Weworski proceeded to put the match out of reach with a birdie at the very next hole.
Weworski won the 11th despite a bogey to go 3-up and took advantage of another Grimes mistake at the 13th to again increase the lead. Weworski then closed the match with a par at the 14th.
'I didn't even know I won,' said Weworski, 42, of Carlsbad, Calif. 'I just wanted to keep playing.'
Grimes admitted that the struggles were too much to overcome despite the fast start.
'Today I didn't feel like I had it,' said the 40-year-old. 'It just wasn't there.'
The Women's Mid-Amateur is one of 13 national championships conducted annually by the United States Golf Association, 10 of which are strictly for amateurs.