McKinnon (calf) was injured during a team workout Saturday, Matt Barrows of The Athletic Bay Area reports.
Per Barrows' source, McKinnon's injury "did not look good." Signed in the offseason to serve the 49ers' No. 1 back, McKinnon missed most of the preseason due to a calf injury but had been increasing his conditioning work in recent days. The nature of the current concern will be known in due time, but Alfred Morris and Matt Breida (shoulder) could be the team's go-to running backs to begin the season.
McKinnon (calf) and Matt Breida (shoulder) both went through conditioning drills in full uniform at Tuesday's practice, Cam Inman of the San Jose Mercury News reports.
The 49ers have been cautious with their injured running backs, limiting them to side work for the past week despite the expectation that both will be fine for Week 1 in Minnesota. McKinnon and Breida seem to be on track for a return to team drills next week after the team cuts its roster down to 53 players. Alfred Morris is making a strong case to be one of the 53, but there hasn't been any indication that he represents a serious threat to McKinnon's expected workload (or Breida's) early in the season.
McKinnon (calf) will be held out for the rest of the preseason, Brian Murphy of KNBR 680 reports.
McKinnon strained his right calf during Sunday's practice, just three days after Matt Breida suffered a separated shoulder in San Francisco's preseason opener. With both running backs now ruled out for the rest of the exhibition slate, the Niners will divide carries between Jeremy McNichols, Joe Williams, Alfred Morris, Raheem Mostert and Jeffery Wilson -- a group that's likely competing for two roster spots. Comments from 49ers brass suggest the team expects both McKinnon and Breida to be ready for Week 1 against Minnesota.
McKinnon will undergo an MRI on his right knee, Nick Wagoner of ESPN.com reports.
McKinnon left Sunday's practice with what was believed to be a knee injury, only for the 49ers to confirm as much afterward. While the MRI may be a precautionary measure, the team likely is sitting on pins and needles just three days removed from losing backup running back Matt Breida (shoulder) for the rest of the preseason. If McKinnon also requires a stint away from the field, Raheem Mostert, Joe Williams, Jeremy McNichols and Jeffery Wilson represent the team's remaining healthy backfield options.
McKinnon also secured several passes during full-team workouts, showing signs of chemistry in the passing game with the 49ers' franchise signal-caller. The running back set new career highs in receptions (51) and receiving yards (421) with the Vikings last season, but there is room for even more growth under head coach Kyle Shanahan, who has generally deployed his backs as dual threats. After inking a four-year deal with San Francisco this offseason, McKinnon should lead the team's backfield committee in 2018, but it's still unclear exactly how many touches per game he should expect to earn.
|8||10/28/18||@ ARI||4:25 pm|
|Bye: Week 11|
|12||11/25/18||@ TB||1:00 pm|
|13||12/2/18||@ SEA||8:20 pm|
|17||12/30/18||@ LAR||4:25 pm|
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|2018||San Francisco 49ers||0||0||0||0||---||0||---||0||0||0||0/0||0||0||---|
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|2018||San Francisco 49ers||0||0||0.0||0||0||0||0||0.0||0||0||0|
|Year||Team||G||Fum||Lost||Fum Forced||Own Rec||Opp Rec||Yds||Tot Rec||TD|
|2018||San Francisco 49ers||0||0||0||0||0||0||0||0||0|