Barbara Hershey.
It's interesting to note that Ms. Hershey appeared in two of the best sports flicks ever made, playing VERY different parts in each.
In Hoosiers she's the level headed high school teacher and interim principal. She's Gene Hackman's love interest.
In The Natural she's the demented psychopath intent on murdering the best athlete in each major sport. She intends to kill the Babe Ruth character, The Whammer, until she she's the unknown Robert Redford character strike out The Whammer during a whistle stop. Once Redford confirms he "will be the best who's ever played the game," she pulls the trigger.
Definitely two very different roles.