I guess I'd assumed so. All we've seen her do is practice throwing and consistently hitting the dunk zone on the preacher's charity dunk tank. Didn't George say she had a pretty good throwing arm? And you'd think that if she wasn't aiming to specialize in throwing that there'd have been some batting and fielding practice; not just throwing the ball. (Though, yeah, it's 30 minute sitcom and they've got better things to show than a montage of all her training) Though thinking about it I guess she did have a glove on this episode when the coach tosser her a ball and told her to warm up. So maybe she is fielding or covering a base.