As I noted last month, October 31st represents this year's deadline not only for fourth-year players to sign rookie scale extensions, but also for option decisions on second- and third-year players.
All of the players listed below are under contract with their respective teams for the 2012/13 season, but only have team options for 2013/14. Their clubs must decide by Halloween whether to lock up these guys for '13/14 for the contract amount indicated in parentheses, or to let them become unrestricted free agents.
That October 31st deadline is still three weeks away, and many of the decisions on these players won't become official until much closer to that date, but we'll be tracking every decision right here for the rest of the month. You can find our rookie contract 2013/14 option tracker anytime on the right sidebar under "Hoops Rumors Features." Here's the list to date, with updates to come as decisions are announced:
     76ers
Evan  Turner ($6.68MM) – Exercised 
Bobcats
Bismack  Biyombo ($3.05MM) – Exercised
Kemba  Walker ($2.57MM) – Exercised
Bucks
Tobias  Harris ($1.55MM) – Exercised
Larry  Sanders ($3.05MM) – Exercised
Ekpe  Udoh ($4.47MM) – Exercised
Bulls
Jimmy  Butler ($1.11MM) – Exercised
Cavaliers
Kyrie  Irving ($5.61MM) – Exercised
Tristan  Thompson ($4.06MM) – Exercised
Celtics
Avery  Bradley ($2.51MM) – Exercised
Clippers
Eric  Bledsoe ($2.63MM) – Exercised
Grizzlies
Quincy  Pondexter ($2.23MM) – Exercised
Heat
Norris  Cole ($1.13MM) – Exercised
Hornets
Al-Farouq  Aminu ($3.75MM) – Declined
Xavier  Henry ($3.2MM) – Declined
Greivis  Vasquez ($2.15MM) – Exercised
Jazz
Alec  Burks ($2.2MM) – Exercised
Derrick  Favors ($6.01MM) – Exercised
Gordon  Hayward ($3.45MM) – Exercised
Enes  Kanter ($4.51MM) – Exercised
Kings
DeMarcus  Cousins ($4.92MM) – Exercised
Jimmer  Fredette ($2.44MM) – Exercised
Knicks
Iman  Shumpert ($1.7MM) – Exercised
Magic
Christian  Eyenga ($2.12MM) – Waived
Nikola  Vucevic ($1.79MM) – Exercised
Mavericks
Dominique  Jones ($2.3MM) – Declined
Nets
MarShon  Brooks ($1.21MM) – Exercised
Nuggets
Kenneth  Faried ($1.37MM) – Exercised
Jordan  Hamilton ($1.17MM) – Exercised
Pacers
Paul  George ($3.28MM) – Exercised
Pistons
Brandon  Knight ($2.79MM) – Exercised
Greg  Monroe ($4.09MM) – Exercised
Raptors
Ed  Davis ($3.15MM) – Exercised
Rockets
Cole  Aldrich ($3.25MM) – Declined
Lazar  Hayward ($2.12MM) – Waived
JaJuan  Johnson ($1.14MM) – Waived
Marcus  Morris ($1.99MM) – Exercised
Patrick  Patterson ($3.11MM) – Exercised
Spurs
Cory  Joseph ($1.12MM) – Exercised
Kawhi  Leonard ($1.89MM) – Exercised
Suns
Wesley  Johnson ($5.42MM) – Declined
Markieff  Morris ($2.09MM) – Exercised
Thunder
Reggie  Jackson ($1.26MM) – Exercised
Timberwolves
Ricky  Rubio ($4MM) – Exercised
Derrick  Williams ($5.02MM) – Exercised
Trail Blazers
Luke  Babbitt ($2.9MM) – Declined
Nolan  Smith ($1.42MM) – Declined
Elliot  Williams ($2.37MM) – Declined
Warriors
Klay  Thompson ($2.32MM) – Exercised
Wizards
Trevor  Booker ($2.35MM) – Exercised
Jordan  Crawford ($2.16MM) – Exercised
Kevin  Seraphin ($2.76MM) – Exercised
Chris  Singleton ($1.62MM) – Exercised
Jan  Vesely ($3.34MM) – Exercised
John  Wall ($7.46MM) – Exercised
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