local_sports
51 MPH PITCH! Astros' Zack Greinke lofts slow pitch in for the strike!
ZACK GREINKE WORLD SERIES HIT!! Astros' pitcher smacks single in World Series Game 4!
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Zack Greinke could pitch out of bullpen
Zack Greinke throws 51 mph pitch against Tigers
local_sports
Zack Greinke: Fast facts about Astros star pitcher
Why Astros veteran Zack Greinke is giving up his slider
Zack Greinke Only Builds His Unique Legend With Incredible Pitch Calling Trick — Here's the Sign, Now Try and Hit It
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Zack_Greinke