MLB 15 The Show roster update three was released including the addition of Addison Russel as well as a host of other player changes and new rookies as you can see below:

PLAYERS ADDED THIS WEEK
PLAYERS TEAM SKIN TONE
Dorn_Danny ARI 6
Russell_Addison CHC 10
Rodon_Carlos CHW 6
Smith_Josh CIN 6
Calixte_Orlando KAN 13
Fuentes_Reymond KAN 8
Liberatore_Adam LAD 6
Plawecki_Kevin NYM 6
Robles_Hansel NYM 8
Harris_Mitch STL 6
Grace_Matt WAS 6

New Rookies
Danny Dorn, 1B, Diamondbacks (63 Overall, D Potential)
Addison Russell, 2B, Cubs (79 Overall, A Potential)
Carlos Rodon, RP, White Sox (70 Overall, A Potential)
Orlando Calixte, SS, Royals (67 Overall, B Potential)
Kevin Plawecki, C, Mets (68 Overall, A Potential)
Hansel Robles, RP, Mets (61 Overall, C Potential)
Mitch Harris, RP, Cardinals (56 Overall, D Potential)
Matt Grace, RP, Nationals (58 Overall, B Potential)

TRANSACTION HIGHLIGHTS
2B Jonathan Schoop moved from Orioles Position to Orioles Minors.
C John Jaso moved from Rays Bench to Rays Minors.
1B James Loney moved from Rays Minors to Rays Position.
SP Drew Smyly moved from Rays Minors to Rays Starting.
DH Justin Smoak moved from Blue Jays Bench to Blue Jays Position.
C Dioner Navarro moved from Blue Jays Position to Blue Jays Minors.
C Josh Thole moved from Blue Jays Minors to Blue Jays Bench.
CP Greg Holland moved from Royals Closer to Royals Minors.
CP Wade Davis moved from Royals Relief to Royals Closer.
CF Gary Brown moved from Cardinals Minors to Angels Minors.
SP Matt Shoemaker moved from Angels Starting to Angels Minors.
LF Carlos Quentin moved from Free Agent 1 to Mariners Minors.
CF Denard Span moved from Nationals Minors to Nationals Position.
CF Michael Taylor moved from Nationals Position to Nationals Minors.
C Travis d’Arnaud moved from Mets Position to Mets Minors.
RF Matt Szczur moved from Cubs Position to Cubs Minors.
DH Chris Denorfia moved from Cubs Bench to Cubs Position.
CF Arismendy Alcantara moved from Cubs Position to Cubs Minors.
SP Homer Bailey moved from Reds Minors to Reds Starting.
3B Yasmany Tomas moved from D’backs Bench to D’backs Position.
3B Jake Lamb moved from D’backs Position to D’backs Minors.
RP LaTroy Hawkins moved from Rockies Relief to Rockies Minors.
RP John Axford moved from Rockies Minors to Rockies Relief.
1B Wilin Rosario moved from Rockies Bench to Rockies Minors.