So they've added a bunch of new people since I've checked:

PLAYERS
GM Dayton Moore
MGR Trey Hillman
P John Bale
P Brian Bannister
Coach Mike Barnett
P Ryan Braun
C John Buck
IF Billy Butler
OF Shane Costa
OF David DeJesus
P Brandon Duckworth
OF Joey Gathright
IF Alex Gordon*
P Zack Greinke
IF Mark Grudzielanek*
OF Jose Guillen
P Luke Hochevar
P Luke Hudson
P Tyler Lumsden
OF Mitch Maier
P Ron Mahay
P Gil Meche
Coach John Mizerock
P Neal Musser
C Miguel Olivo
Coach Dave Owen
SS Tony Pena, Jr.
FB Ryan Shealy
Coach Luis Silverio
OF Mark Teahen
* Only appearing on Friday.

ALUMNI
Mike Boddicker
Dennis Leonard
John Mayberry
Brian McRae
Greg Pryor
Jamie Quirk
Kevin Seitzer
John Wathan
Frank White

BROADCASTERS
Bob Davis
Ryan Lefebvre
Denny Matthews
Steve Stewart  

The most recent adds are Guillen, Mahay & Olivo.  So who all is going?