Robert Quinn injury: concussion sidelines St. Louis Rams' sack leader

Jeff Curry-US PRESSWIRE

St. Louis Rams sack leader Robert Quinn missed practice Wednesday with a concussion.

The St. Louis Rams were without a key member of their defensive unit in Wednesday's practice, as Robert Quinn sat out with a concussion.

Quinn leads the team in sacks this season with 8.5 and is part of a pass rush duo with fellow defensive end Chris Long, who has seven sacks.

Heading into the year, St. Louis appeared to have two budding blue-chip players in Quinn and Long. In his first four seasons in the league, Long improved on his sack total every year and recorded 13 in 2011. In his rookie campaign last season, Quinn added five sacks in limited playing time.

Now, the tandem needs 4.5 sacks between them in the remaining five games to give the Rams two pass rushers with double-digit sacks.

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