While it's a little early to throw Reds third baseman Todd Frazier into that group, there's no denying the rookie's odd swing in some at-bats.
"This is not how you would teach your kid to hit," Reds manager Dusty Baker said of Frazier's rear-end-out, one-handed hack in some plate appearances.
It may not be the prettiest swing in baseball, but it certainly hasn't been an unsuccessful one.
Filling in at third base and left field this season, Frazier is hitting .280 entering Saturday, with 10 home runs and 30 RBIs in 182 at-bats.
"I don't know what it is this year. My butt goes out and I don't use my legs and I hit the ball better," Frazier said with a laugh. "Players have been talking about it, too. I say, 'Hey, man, if I hit it normally, I'd probably ground out or something.'"
The awkward-looking swing seems to be working for Frazier right now, but Baker said it's something they want to nip in the bud before it becomes a major problem.
"There's certain absolutes and different things you have to do to hit or pitch, but there's no one standard way to teach it," Baker said. "When he's in sync, he's in sync. Guys that have unorthodox swings, when you get out of sync, you have a lot of moving parts.
"You've got a guy like Joey [Votto] and his very simple approach, it's a lot easier to fix it if they get out of sync. And it's easier to close their holes once they figure out how to pitch to you."