New 49er Grissom believes he's yet to tap his potential

Daily 49ers blog for NBC Bay Area website: Speedy wideout Marquise Grissom spent four years in Buffalo, but the former Olympian didn't live up to expectations. Now with the 49ers, he believes he can thrive in Kyle Shanahan's system. http://www.nbcbayarea.com/news/local/Niners-Are-Betting-on-Goodwins-Potential-416138203.html