Florida cornerback Joe Haden, considered a top candidate for the Browns' first-round selection at No. 7, turned in disappointing 40 times in workouts Tuesday at the NFL Scouting Combine in Indianapolis.
According to the NFL Network, Haden clocked unofficial times of 4.57 and 4.60.
''I've never run a 4.5 in my life,'' Haden said afterward in an interview on the NFL Network. ''I'm definitely going to have run that back again and definitely show that I'm not 4.5 at all, definitely 4.4. On film you can see I don't play 4.4, I react, I keep up with everybody who runs 4.3. I hope you see that.
''I don't know what happened. I had my waffle shoes on. On my start, I didn't come out as powerful. I'm definitely going to run again in Gainesville. Back at school I run 4.34 every time, so 4.57 is definitely, I don't understand what happened.''
In an interview with the media Sunday, Haden said he hoped to clock between 4.37 and 4.42 seconds in the 40, along with hitting 40 inches in the vertical jump. He did neither.
He had been training at his father's training facility in Maryland, which prepares high school athletes for college camps. His father, Joe Sr., is a former professional bodybuilder and track standout at Morgan State.
In other drill results posted on NFL.com, Haden took eighth among cornerbacks in the broad jump (10-5) and third in the 60-yard shuttle (11.12).
''I have really good ball skills,'' Haden said on the NFL Network. ''Everything else I thought I did really well. The only thing was the 40, but overall I had a really good time.''
NFL Network analyst Mike Mayock said before the workouts that his biggest concern was Haden's ''long speed.''
''I want to see him transition beyond 12, 15 yards, flip his hips and run,'' Mayock said last week. ''I need to see what his 40 is going to be. There's some people who think he might only run 4.52 or 4.55 and if that's the case, people will be concerned. And I want to see his back pedal and see him open up and drive. Those are the two things that will confirm to me that he's a legitimate top 10 pick.''
Florida's March 17 pro day was already slated to draw a huge crowd with quarterback Tim Tebow debuting his new throwing motion.
Tennessee's Eric Berry had a good day as the combine concluded, clocking 4.47 in the 40, trailing only USC's Taylor Mays (4.43) among safeties. Berry is another candidate for the Browns' No. 7 pick, although he could go in the top five.
Berry also placed first in the vertical jump (43 inches) and first in the broad jump (10-10) and tied for eighth in the bench press by lifting 225 pounds 19 times. The latter effort was matched by Ohio State's Kurt Coleman.
Considered an inconsistent underachiever at USC, Mays turned it on in workouts, tying for second in the bench press (24 reps), finishing second in the vertical jump (41) and second in the broad jump (10-5).
Perhaps to no one's surprise, Brandon Ghee of Wake Forest dominated the cornerback drills. Ghee ran the top 40 time of 4.45, was second in the broad jump (10-7), tied for third in the 20-yard shuttle (4.07) and took fifth in the 60-yard shuttle (11.21). Ghee is thinly built and was labeled an ''athletic marvel'' in Pro Football Weekly's ''2010 Draft Guide.'' Plagued by mental lapses, Ghee is projected by Pro Football Weekly as a special teams gunner.