Keenan Allen Reportedly Red-Flagged for Drug Test at NFL Scouting Combine

Former California Bears star receiver Keenan Allen has long been expected to be a first-round pick in the 2013 NFL draft, but his stock may have just taken a substantial hit. 

According to ESPN's Adam Schefter, the receiver was red-flagged for failing a drug test at the NFL Scouting Combine in Indianapolis last month:

A subsequent report by Schefter notes that Allen's agent, J.T. Johnson, denies his client failed any sort of drug test. A source told Schefter that Allen had suspiciously high levels of water in his system during the combine.

The promising prospect has already been retested this month and is awaiting the results, which will prove critical to teams considering him in the early part of the draft.

Allen is viewed as the top wideout in the 2013 draft class in some evaluators' eyes, and he has the size to line up on the outside as well as the versatility to line up in the slot to be a threat. This apparent mistake could knock him out of the first round despite his immense talent. 

It definitely wasn’t a positive combine experience for Allen, especially in light of this information. He already could not participate in drills due to a knee injury and this news makes his draft status all the more ominous.

A Grade 2 PCL strain cut Allen's final collegiate season short. However, he did register 61 catches for 737 yards and six touchdowns, and he also scored a rushing touchdown and found the end zone once as a punt returner for the Bears in 2012.