49ers coach Jim Harbaugh has cautioned Colin Kaepernick not to get "too jacked-up."
Kaepernick has spent the entire offseason in the gym. "If you're just talking about weightlifting and upper-body strength, yes, I think there is that fear," Harbaugh said. "It's something we've talked about. 'I don't want you getting too jacked-up, Colin.' I want some speed, quickness, not just (flexing chest his muscles)." It says a lot about Kaepernick's future that getting too strong is his coach's fear. Kaepernick could be on the precipice of a colossal fantasy campaign.