knuckler

n.

慢速变化球；

Here comes the knuckler
WILBUR'S KNUCKLER IS ALIVE AND SWELL
The Next Best White-Knuckler
KNUCKLER KEEPS REDS' FERNANDEZ IN THE RUNNING.(SPORTS)
Knuckler : my life with baseball's most confounding pitch
The No-Spit Sleeping Knuckler With a Twist
Sea Dogs' Zink gets a grip on knuckler
Serendipity: `Freak of nature' meets knuckler.(SPORTS)(JIM SOUHAN)
Wake up to old tricks; Ageless knuckler sets win mark in Sox' rout of Rays.(Sports)
From reclamation project to staff ace, Wakefield has put hearts aflutter with his knuckler He's done the trick