And that's what makes playing with him so great." #49ers RB Christian McCaffrey from Inside Training Camp on @nflnetwork on wife Olivia as super mom: "She's been great. … I feel guilty at times.

San Francisco 49ers star Christian McCaffrey's health will be a major factor in whether the 49ers return to form this season.

It's risky banking on a 29-year-old RB coming off an injury-riddled season. McCaffrey's stats with San Francisco help paint a picture of why the potential reward is worth that risk. More 49ers ...