A round up of Preseason action ahead of the 2013 NFL season.
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San Francisco 49ers A.J. Jenkins fumbles the ball as he is hit by Denver Broncos Duke Ihenacho (L) after an 11 yard reception from QB Scott Tolzien in the second quarter at Candlestick Park in San Francisco on August 8, 2013. The 49ers lost the ball on the play. The Broncos won 10-6. UPI/Terry Schmitt
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