Sept. 1 is a key time for Major League Baseball as league rules allow rosters to expand from the 25-man limit. Any player who is on the 40-man roster may be brought up to the majors to help in the final month of the regular season.
September call-ups 2013: Nick Castellanos, Michael Choice and Billy Hamilton brought up
As MLB rosters expand, SB Nation has a full list of players called up so far in September.


Some call-ups are top prospects who are seeing their first action in the majors. Some are veterans who could provide help down the stretch run for teams in a playoff chase. Some fill a very certain role: A speedster to pinch-run late in games, an emergency third catcher or relievers who can take some innings in blowout games. Some teams call up one or two players while others bring up five or six.
Not all September call-ups are made immediately. Minor league playoff serieses will begin soon and many players who will be called up will remain with their minor league squad until their postseason is done.
Here is a list of call-ups that have been announced so far:
RHP Ryan Brasier
RHP Jorge De Leon
OF Trevor Crowe
LHP Pedro Figueroa
INF Andy Parrino
2B Jemile Weeks
OF Michael Choice
RHP Steve Delabar
RHP Dustin McGowan
RHP Freddy Garcia
C/OF Evan Gattis will be called up Tuesday
RHP Donovan Hand
OF Adron Chambers
RHP Alberto Cabrera
Diamondbacks
RHP David Hernandez
LHP Tony Sipp
C Drew Butera
RHP Stephen Fife
SS Dee Gordon
OF Scott Van Slyke
RHP Peter Moylan
RHP Preston Guilmet
RHP Blake Wood
LHP Nick Hagadone
C Kelly Shoppach
INF Jose Ramirez
RHP Chris Hatcher
LHP Zach Phillips
3B Zach Lutz
LHP Tim Byrdak
RHP Vic Black
C Chris Snyder
C Steve Clevenger
LHP Wei-Yin Chen
LHP Tommy Layne
C Chris Robinson
INF/OF Cesar Hernandez
INF/OF Michael Martinez
LHP Kris Johnson
RHP Kyle Farnsworth
RHP Tom Wilhelmsen
C Mike Zunino will be called up Monday
RHP Cory Burns
C Robinson Chrinos
OF Jim Adduci
OF Delmon Young
C Chris Gimenez
RHP Josh Lueke
OF Quintin Berry
C Ryan Lavarnway
RHP Rubby De La Rosa
Rockies
INF Josh Rutledge
LHP Francisley Bueno
C Brett Hayes
INF Danny Worth
OF Nick Castellanos
RHP Evan Reed
C Josmil Pinto
OF Alex Presley
LHP Charlie Leesman
C Bryan Anderson
RHP Brett Marshall
3B David Adams
C J.R. Murphy
RHP Dellin Betances
LHP Cesar Cabral











