UPDATE: Official presser:
SAN ANTONIO (April 12, 2013) – The San Antonio Spurs today announced that they have placed forward Stephen Jackson on waivers.
Jackson, who was in his second stint with the Spurs, saw action in 55 games this season, averaging 6.2 points, 2.8 rebounds and 1.5 assists in 19.5 minutes.
A 13-year NBA veteran, Jackson has appeared in 849 career games, averaging 15.3 points, 3.9 rebounds, 3.1 assists and 1.30 steals in 32.1 minutes.
The Spurs roster now stands at 14.
"Gregg Popovich and Stephen Jackson have been sparring over Jax's role throughout season; disagreements resurfaced this week, source tells Y!"
"Spurs and Jackson discussed a release prior to trade deadline, but sides agreed to go forward together for rest of season"
Jackson averaged 6 points 2 rebounds and 20 minutes this season.
UPDATE: Jack posted this an hour before the news broke