Denver Broncos running back C.J. Anderson suffers significant knee injury

Aug 8, 2013; San Francisco, CA, USA; Denver Broncos running back C.J. Anderson (39) carries the ball against the San Francisco 49ers during the third quarter at Candlestick Park. The Denver Broncos defeated the San Francisco 49ers 10-6. Mandatory Credit: Kelley L Cox-USA TODAY Sports
Aug 8, 2013; San Francisco, CA, USA; Denver Broncos running back C.J. Anderson (39) carries the ball against the San Francisco 49ers during the third quarter at Candlestick Park. The Denver Broncos defeated the San Francisco 49ers 10-6. Mandatory Credit: Kelley L Cox-USA TODAY Sports /
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Aug 8, 2013; San Francisco, CA, USA; Denver Broncos running back C.J. Anderson (39) carries the ball against the San Francisco 49ers during the third quarter at Candlestick Park. The Denver Broncos defeated the San Francisco 49ers 10-6. Mandatory Credit: Kelley L Cox-USA TODAY Sports
Aug 8, 2013; San Francisco, CA, USA; Denver Broncos running back C.J. Anderson (39) carries the ball against the San Francisco 49ers during the third quarter at Candlestick Park. The Denver Broncos defeated the San Francisco 49ers 10-6. Mandatory Credit: Kelley L Cox-USA TODAY Sports /

Despite a crowded backfield in Denver, Broncos running back C.J. Anderson has manged to generate some buzz during training camp, and that led to a breakout performance in last week s preseason game against the San Francisco 49ers when he ran for 69 yards on 15 carries.

But all of that momentum may have come sadly come to a screeching halt today, as the undrafted rookie out of Cal-Berkeley was carted off of the practice field today with a right knee injury.

Thankfully, it doesn’t appear the injury will knock Anderson out for the entire upcoming NFL season:

"Tests on C.J. Anderson’s right knee revealed a sprain to the medial collateral ligament, according to an NFL source — and not a torn anterior cruciate ligament as was the fear when the running back went down in pain during practice Thursday. Anderson is expected to be out four to six weeks."

In his senior year of college at Cal-Berkeley, Anderson ran for 790 yards on 126 carries while battling two other backs for playing time in a committee approach.