McKinnon offered up the following words of encouragement to Garoppolo via Twitter.
McKinnon's injury, unlike Garoppolo's, occurred during a light practice as the team started work to prepare for the Minnesota Vikings. McKinnon was slated to be the opening day starter and was eager to play against his former team at U.S. Bank Stadium.
Garoppolo's injury occurred on a 3rd-and-goal play from the 20-yard line as the quarterback scrambled to gain yardage. The 49ers were trying to mount a comeback against the Chiefs.
NFL Network insider Ian Rapoport said on KNBR that fans can expect the quarterback back in time for the 2019 regular season, possibly sooner.
"Obviously, no one wants to lose a quarterback for the season," Rapoport said. "It's all bad. Everything is bad. However, he's going to be fine by the time — absent something crazy happening — he's going to be fine by the time next season begins. Probably even by the time next training camp begins."