Talk about a Senior moment. 

The rules have changed since the last time Lee Ann Walker competed in an LPGA-sanctioned event.

She found out the hard way.

RELATED: Paige Spiranac is Working on Her Golf Game and Her Thirst Trap Game

Walker shot rounds of 85 and 74 at the Senior LPGA Championship.

That was before she had to add 42 penalty shots to her opening round in French Lick, Indiana, and 16 more to the second round, giving her scores of 127 and 90.

Flip the Page to See Why She Got the Penalties: