San Diego Chargers wide receiver Malcom Floyd (80) watches as Minnesota Vikings cornerback Josh Robinson (21), who broke up a pass intended for Floyd, winds up on his head in the first half of in an NFL preseason football game on Friday, Aug. 17, 2012, in Minneapolis. (AP Photo/Jim Mone)

San Diego Chargers running back Le'Ron McClain (33) breaks a tackle by Minnesota Vikings defensive back Antoine Winfield (26) in the first half of an NFL preseason football game on Friday, Aug. 24, 2012, in Minneapolis. (AP Photo/Genevieve Ross)

Minnesota Vikings running back Toby Gerhart (32) gains yardage before being brought down by San Diego Chargers defensive tackle Corey Liuget (94) in the first half of an NFL preseason football game on Friday, Aug. 24, 2012 in Minneapolis. (AP Photo/Jim Mone)

San Diego Chargers quarterback Charlie Whitehurst (6) throws a pass in the first half of an NFL preseason football game against the Minnesota Vikings, Friday, Aug. 24, 2012, in Minneapolis. (AP Photo/Jim Mone)

Minnesota Vikings defensive back Antoine Winfield (26) and linebacker Erin Henderson, right, bring down San Diego Chargers running back Le'Ron McClain (33) in the first half an NFL football game on Friday, Aug. 24, 2012, in Minneapolis. (AP Photo/Jim Mone)

Minnesota Vikings tight end Kyle Rudolph (82) leaves San Diego Chargers defensive tackle Aubrayo Franklin (90) on the turf as he breaks a tackle on a pass play in the first half of an NFL football game on Friday, Aug. 24, 2012, in Minneapolis. (AP Photo/Jim Mone)

Minnesota Vikings running back Toby Gerhart (32) is brought down by San Diego Chargers defensive tackle Corey Liuget (94) and linebackers Shaun Phillips (95) and Jarret Johnson (96) in the first half of an NFL preseason football game on Friday, Aug. 24, 2012, in Minneapolis. (AP Photo/Genevieve Ross)

Minnesota Vikings running back Adrian Peterson looks on from the sidelines during an NFL preseason football game against the San Diego Chargers, Friday, Aug. 24, 2012, in Minneapolis. Peterson is recovering from a torn ACL suffered last year. (AP Photo/Jim Mone)

Minnesota Vikings wide receiver Michael Jenkins (84) carries the ball against San Diego Chargers cornerback Gregory Gatson in the first half of an NFL preseason football game on Friday, Aug. 24, 2012, in Minneapolis. (AP Photo/Genevieve Ross)

Minnesota Vikings running back Matt Asiata (48) runs against San Diego chargers linebacker Donald Butler in a preseason NFL football game on Friday, Aug. 24, 2012, in Minneapolis. (AP Photo/Andy King)

San Diego Chargers quarterback Charlie Whitehurst, center, is sacked by Minnesota Vikings linebacker Jasper Brinkley (54), linebacker Erin Henderson (50) and defensive end Jared Allen, bottom right, in the first half of an NFL preseason football game on Friday, Aug. 24, 2012, in Minneapolis. (AP Photo/Genevieve Ross)

Minnesota Vikings wide receiver Percy Harvin (12) makes a catch against the San Diego Chargers in the first half of an NFL preseason football game on Friday, Aug. 24, 2012, in Minneapolis. (AP Photo/Genevieve Ross)

San Diego Chargers kicker Nick Novak (9) boots a field goal against the Minnesota Vikings in the first half of an NFL preseason football game on Friday, Aug. 24, 2012, in Minneapolis. (AP Photo/Genevieve Ross)

Minnesota Vikings quarterback Christian Ponder (7) scrambles for yardage against San Diego Chargers cornerback De'Andre Presley (39) in the first half of an NFL preseason football game on Friday, Aug. 24, 2012, in Minneapolis. (AP Photo/Genevieve Ross)

San Diego Chargers cornerback De'Andre Presley (39) joins in the effort to bring down Minnesota Vikings running back Matt Asiata (48) in the second half of an NFL preseason football game on Friday, Aug. 24, 2012, in Minneapolis. (AP Photo/Genevieve Ross)

Minnesota Vikings tight end Kyle Rudolph (82) is brought down by San Diego Chargers cornerback De'Andre Presley (39) in the second half of an NFL preseason football game on Friday, Aug. 24, 2012, in Minneapolis. (AP Photo/Andy King)

Minnesota Vikings running back Matt Asiata (48) hits the turf as he is tripped by San Diego Chargers strong safety Brandon Taylor (28) in the second half of an NFL preseason football game on Friday, Aug. 24, 2012, in Minneapolis. Chargers linebacker Melvin Ingram (54) moves in. (AP Photo/Andy King)

San Diego Chargers running back Edwin Baker (27) gains yardage against Minnesota Vikings defensive back Chris Carr (25) during the second half of an NFL preseason football game, Friday, Aug. 24, 2012, in Minneapolis. The Chargers won 12-10. (AP Photo/Genevieve Ross)