The Milwaukee Brewers chorizo!

@Brewers if you need a Chorizo fill in, let us know! pic.twitter.com/DY0wksfjpC

— Joel Schneider (@joelschneider25) October 31, 2015

Mets dog at the World Series:

This guy makes no bones about his World Series team allegiance. #Mets pic.twitter.com/xbtfxDs1Pg

— Jerry Crasnick (@jcrasnick) October 31, 2015

Andrew McCutchen!

@Pirates #Buccoween pic.twitter.com/Xb4dOzNuxl

— Matthew DiGiacomo (@Maldig528) October 31, 2015

Washington Nationals reliever Aaron Barrett and his wife:

Happy Halloween! #🐻#🎃 @kmbarrett22 pic.twitter.com/hCszD0jcIO

— Aaron Barrett (@aaronbarrett30) October 31, 2015

Indians ace Corey Kluber and family:

The things we do for our kids... #BeautyAndTheBeast pic.twitter.com/TdHoCL5q4F

— Corey Kluber (@CKluber) October 31, 2015

Haray Caray:

Happy Halloween! @Cubs pic.twitter.com/eLIHAJnYUX

— L Ray (@LisaCcbylee) October 31, 2015

Oakland Athletics mascot Stomper:

Happy Halloween from Baby Stomper! @afreshboy @Stomper00 @Athletics @athleticsnation pic.twitter.com/ybhuarQDyk

— christapants (@christapants) October 31, 2015

Colby Rasmus!

The Colby Rasmus Halloween costume pic.twitter.com/pPTtUVkOBt

— Tony_Rasmus_IV (@TonyRasmusIV) October 31, 2015

Derek Norris!

My son dressed as Derek Norris for Halloween ##1fan #norrisaurusrex #HappyHalloween @d_no36 @MsD_No36 @Padres pic.twitter.com/yp2MVVZ63n

— Tyra (@Tyra_SanD) October 30, 2015

Hunter Pence and pal as the burglars from "Home Alone":

Marv dresses up as Hunter Pence for Halloween. #HunterPenceSigns https://t.co/ECtPskyQup pic.twitter.com/zNrZvcT2Fv

— Hun-Terror Pence (@hunterpence) October 30, 2015

Fredbird and Adam Wainwright!

@Cardinals @UncleCharlie50 Fredbird and Waino! Best Halloween costumes this year? #cardinalnation #GoCardinals pic.twitter.com/AGAb8rig5B

— Jeff Manka (@jmanka_goCards) October 31, 2015