BOISE, Idaho -- Former NBA All-Star Antoine Walker is calling it quits after spending two seasons trying to rejuvenate his career with the Idaho Stampede.

The 35-year-old Walker announced his retirement last weekend to teammates, and The Idaho Statesman reports Walker intends to make a formal announcement this week.

Walker is a 12-year NBA veteran and was a member of the Kentucky team that won the NCAA championship in 1995-96. He also won an NBA title in 2006 with the Miami Heat and averaged 17.5 points and 7.7 rebounds per game as a pro.

This season in the D-League, Walker averaged 9.5 points and 4.9 rebounds. In December, Walker was sentenced to probation and told to pay $770,000 in restitution to Las Vegas casinos after pleading guilty to failing to repay gambling debts.