Roquan Smith ran an official 4.51-second 40-yard dash at the 2018 NFL Scouting Combine. The Georgia linebacker’s result was the second-fastest time among linebackers at that event, according to Chicago’s draft coverage. It gave teams a clear measure of the straight-line speed he brought to the position.
For a linebacker, that number matters. The job requires a player to track running backs, cover space, and close on the ball while carrying enough size to handle contact.
Still, a fast 40 time tells only part of the story. Smith’s performance becomes more useful when viewed alongside his build, college play, and the demands of his position. Here is what his combine result showed—and how to understand it without giving one sprint too much weight.
What Was Roquan Smith’s Official 40 Time?
Smith’s official 40-yard dash time was 4.51 seconds in 2018. That is the result to use when discussing his combine performance.
The test measures how quickly a player covers 40 yards from a stationary start. It gives evaluators a controlled way to assess acceleration and straight-line running speed.
Smith’s result stood out within his position group. Finishing second among linebackers showed that speed was a clear strength in his athletic profile.
The year is also important. This was a recorded performance before he entered the NFL. It should not be presented as a recent test or proof of his exact running speed today.
Roquan Smith’s Combine Measurements
Smith’s sprint makes more sense when paired with his size. A linebacker must move well while also having the strength and technique to work through traffic.
| Metric | Measurement |
|---|---|
| Official 40-yard dash | 4.51 seconds |
| Combine year | 2018 |
| Height, rounded | 6 feet 1 inch |
| Combine weight | 236 pounds |
| Arm length | 32 inches |
| Hand size | 10 inches |
Chicago’s reporting confirms the dash time, while Minnesota’s pre-draft profile lists Smith at 6 feet 1 inch and 236 pounds. His NFL player profile lists 32-inch arms and 10-inch hands. chicagobears.com
Why do some tables show 235 pounds? That figure appears in his NFL player listing. His combine weight was reported as 236 pounds. When describing the 2018 workout, 236 pounds is the more precise figure to use.
The difference is small, but keeping a playing weight separate from a combine weigh-in helps avoid confusion.
Was a 4.51-Second Dash Fast for a Linebacker?
Yes. Smith’s result was fast for his position at the 2018 combine.
The clearest comparison is his placement within that year’s linebacker group. A second-place finish provides firmer context than calling the time “good” without explaining what it was measured against.
It also matters that linebackers have different physical demands from wide receivers or defensive backs. They must cover ground, but they also face blockers and tackle ball carriers near the line of scrimmage.
A useful evaluation therefore asks several questions:
- How fast did the player run?
- How much did he weigh?
- Did that movement show up in games?
- Could he change direction and finish tackles?
- Did he recognize plays quickly enough to use his speed?
Smith’s 4.51-second result answered the first question well. The rest required a broader review of his play.
What the 40-Yard Dash Actually Measures
The 40-yard dash captures a player’s ability to start, accelerate, and run in a straight line.
Those traits can help a defender close space. A linebacker who builds speed quickly may have a better chance to reach an outside run or pursue a ball carrier downfield.
However, the test does not require the player to read an offense. There is no blocker to avoid, no route to identify, and no sudden cut to respond to.
A linebacker’s game movement often follows a more complex sequence:
- Read the play.
- Choose a path to the ball.
- Move through or around traffic.
- Adjust to the ball carrier.
- Finish the tackle.
The combine sprint isolates one part of that process. It is valuable because it measures a specific athletic trait, but it cannot replace a full football evaluation.
How Smith’s Speed Can Help Against the Run
The following examples explain how straight-line speed can support linebacker play. They are football interpretations, rather than measurements taken from Smith’s combine run.
Pursuing Outside Runs
On an outside run, a linebacker may need to move from the middle of the defense toward the sideline.
Speed helps him cover that distance. Yet the pursuit angle is just as important. Taking a path that is too shallow can allow the runner to escape outside. Taking a path that is too wide can leave room for a cutback.
Smith’s combine result demonstrated the running ability to cover ground. Whether that ability produces a tackle depends on his read, angle, and response to the runner.
Closing on a Ball Carrier
Once a linebacker identifies the play, acceleration can help him reduce the space between himself and the runner.
That closing speed may limit the time a ball carrier has to change direction. It can also help a defender reach the play before a short gain becomes a longer one.
The final steps still demand control. Arriving quickly is useful only if the defender stays balanced enough to make the tackle.
Pursuing After the First Defender Misses
Linebackers also need to keep chasing when a play moves beyond its intended path.
A fast defender may be able to join a tackle downfield or catch a runner who has escaped the first wave of the defense. Those plays show why effort and speed work well together.
The 40 time measures the running component. It does not measure the decision to keep pursuing.
How Speed Helps in Pass Coverage
Linebackers often have coverage responsibilities against running backs, tight ends, and receivers moving through their zones.
Straight-line speed can help them stay close when an eligible receiver runs upfield. It can also help them close on a short completion.
But coverage requires more than keeping pace.
A linebacker must understand where a route is going, maintain useful positioning, and react when the receiver changes direction. He also has to locate the ball without losing track of the player he is covering.
This is why a fast dash does not automatically make someone a strong coverage defender. Smith’s result showed a physical tool that could support coverage. Evaluating the quality of that coverage requires watching actual plays.
Why Play Recognition Matters as Much as Running Speed
A linebacker can lose valuable time before he takes his first step.
If he misreads the play or hesitates, he may start moving after the offense has already gained an advantage. A faster sprint can help him recover, but it cannot always erase that delay.
A defender who reads the play early can take a shorter, more direct path to the ball. That is one reason some players appear faster in games than their timed results might suggest.
For Smith, the useful question is how his athletic ability works with his decisions.
When watching his play, look for whether he:
- Identifies the direction of the run early.
- Maintains his assignment while tracking the ball.
- Chooses a direct pursuit angle.
- Adjusts when the runner cuts.
- Arrives under control.
Those details explain how a linebacker turns speed into useful defensive movement.
What to Watch Beyond the Stopwatch
Roquan Smith’s 4.51-second dash gives a clear answer to the basic question about his speed entering the NFL. Its value grows when you connect it to the work a linebacker performs on the field.
When you next watch Smith, follow him from the snap through the end of the play. Notice his first read, his route to the ball, and his balance as he closes. That sequence shows how running ability, judgment, and technique combine to produce a defensive play.
