INDIANAPOLIS - Oklahoma State wide receiver Justin Blackmon won't run the 40-yard dash at the Scouting Combine after injuring his hamstring last week. He might participate in some short routes during receiver drills, but won't do anything this week that requires "opening up" and threaten his ability to perform at the Cowboys' March 7 Pro Day.
Blackmon, NFLDraftScout.com's top-rated wide receiver and No. 5 prospect overall, also measured in a hair under 6-1, shorter than his previously listed size.
"I know you get shorter every year," he quipped.
It also makes previous comparisons to Detroit's Calvin Johnson difficult.
"He's a big, physical guy and that's how I like to play," Blackmon said when asked about similarities between the two.
In addition to his smaller than advertised size, Blackmon still has to answer questions about his straight-line speed. He said with a laugh that he'd "like to run a 4.2" in the 40-yard dash, but said he expects to run in the 4.4 or 4.5 range.
"I tell (people) to look at the tape, I've never been caught from behind," Blackmon said.
Blackmon also admitted he has some work to do on his route-running.
"I know I have a lot to work on with route running," said Blackmon. "I am working on it continually. I know I have work to do and I'm willing to do it."
As confident as he plays on the field, Blackmon described himself as quietly confident off it.
Asked to explain, he dead-panned: "I don't speak much."