San Diego Chargers running back Darren Sproles will need to pass baseline concussion tests to play in this week's pivotal AFC West match-up with the Kansas City Chiefs.

Sproles sustained his concussion late in the second quarter of Sunday's 28-13 loss to the Oakland Raiders, when he was hit by rookie linebacker Rolando McClain after catching a short pass over the middle.

Though the Chargers claimed that there was helmet-to-helmet contact, Jerry McDonald of the Bay Area News Group cites the post-game pool report, where referee John Parry explained that Sproles was not a defenseless receiver on the play.

"We had three guys looking at it, the back judge, field judge, line judge. All three felt that (Sproles) gained possession, took a minimum of three steps and now he is considered a runner so helmet-to-helmet contact is off."

"Legal hit. We support the pool report", Corry Rush of the NFL told McDonald on Monday, meaning McClain will not be fined for the hit.