By Daniel Bates Erick Dampier had a lengthy NBA career, playing 16 seasons with the Pacers, Warriors, Mavericks, Heat and Hawks. The 6-foot-11 center was a serviceable big, doing a lot of the dirty work for some terrific Mavs teams in the mid-2000’s. Now his son, Erick Dampier Jr., is making a name for himself as a dominant 6-foot-5 point guard. In sixth grade. Dampier’s highlight reel got a ton of reaction on social media. “SIXTH. GRADE,” tweeted Rex Chapman with a mindblower emoji. “Mavs always one step ahead,” replied CBS Sports’ Shehan Jeyarajah. “Damp Jr. whoa,” commented Warriors World. …