Article Photos: Bobcats exercise options on Walker, Biyombo



Charlotte Bobcats' Kemba Walker drives around Miami Heat's Norris Cole (30) during the first half of an NBA preseason basketball game in Raleigh, N.C., Tuesday, Oct. 23, 2012. Miami won 98-92. (AP Photo/Gerry Broome)

Charlotte Bobcats' Kemba Walker drives around Miami Heat's Norris Cole (30) during the first half of an NBA preseason basketball game in Raleigh, N.C., Tuesday, Oct. 23, 2012. Miami won 98-92. (AP Photo/Gerry Broome)