49ers LB Dre Greenlaw undergoing surgery, will miss time
San Francisco 49ers star Dre Greenlaw to miss 6-8 weeks
San Francisco 49ers LB Dre Greenlaw to have groin surgery, out
49ers LB Dre Greenlaw undergoing surgery, will miss time
Former Hog Greenlaw still battling the injury bug
Source - San Francisco 49ers LB Dre Greenlaw to have groin surgery
49ers injury update: LB Dre Greenlaw activated off IR