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In an otherwise slow NFL Combine, defensive backs did well on Monday with Auburn's Jonathan Jones leading the entire group with a 4.33 40-yard dash.
Clemson's Mackensie Alexander did not participate due to a hamstring injury and Vernon Hargreaves of Florida underwhelmed with a 4.50 in the drill, but some of the other top defensive backs had a solid showing in the 40-yard dash.
Florida State defensive back Jalen Ramsey drew comparisons to Patrick Peterson on NFL Network with his big numbers and kept the hype rolling with a time of 4.41 seconds in the 40-yard dash. While he'll hang his hat on his marks in the vertical and broad jump, the mark for Ramsey is more than enough to keep him solidly locked in the top 10 of mock drafts.
Also impressive were Houston cornerback William Jackson, who finished in 4.37 seconds, and Ohio State cornerback Eli Apple, who timed in at 4.40 seconds. Apple has appeared in the back half of the first round in most mock drafts, but Jackson has only sneaked into a handful of mocks.
Below are the full results for the defensive backs in the 40-yard dash:
| Name | School | Height | Weight | 40-yard (Official) |
| Mackensie Alexander | Clemson | 5'10 | 190 | -- |
| Eli Apple | Ohio State | 6'1 | 199 | 4.40 |
| Vonn Bell | Ohio State | 5'11 | 199 | -- |
| Briean Boddy-Calhoun | Minnesota | 5'9 | 193 | 4.47 |
| James Bradberry | Samford | 6'1 | 211 | 4.50 |
| Anthony Brown | Purdue | 5'11 | 192 | 4.35 |
| Lamarcus Brutus | Florida State | 6'0 | 206 | 4.76 |
| Artie Burns | Miami(FL) | 6'0 | 193 | 4.46 |
| Juston Burris | North Carolina State | 6'0 | 212 | 4.53 |
| Deon Bush | Miami(FL) | 6'0 | 199 | 4.64 |
| Taveze Calhoun | Mississippi State | 6'0 | 192 | 4.58 |
| Maurice Canady | Virginia | 6'1 | 193 | 4.49 |
| Tevin Carter | Utah | 6'1 | 218 | -- |
| Jeremy Cash | Duke | 6'0 | 212 | -- |
| Ken Crawley | Colorado | 6'0 | 187 | 4.43 |
| Sean Davis | Maryland | 6'1 | 201 | 4.46 |
| K.J. Dillon | West Virginia | 6'0 | 210 | 4.53 |
| DeAndre Elliott | Colorado State | 6'1 | 188 | 4.55 |
| Kavon Frazier | Central Michigan | 6'0 | 217 | -- |
| Kendall Fuller | Virginia Tech | 5'11 | 187 | -- |
| T.J. Green | Clemson | 6'2 | 209 | 4.34 |
| Deiondre' Hall | Northern Iowa | 6'2 | 199 | 4.68 |
| Vernon Hargreaves III | Florida | 5'10 | 204 | 4.50 |
| De'Vante Harris | Texas A&M | 5'11 | 176 | 4.56 |
| DeAndre Houston-Carson | William & Mary | 6'1 | 201 | 4.54 |
| Xavien Howard | Baylor | 6'0 | 201 | 4.58 |
| William Jackson III | Houston | 6'0 | 189 | 4.37 |
| Cyrus Jones | Alabama | 5'10 | 197 | 4.49 |
| Jonathan Jones | Auburn | 5'9 | 186 | 4.33 |
| Karl Joseph | West Virginia | 5'10 | 205 | -- |
| Jayron Kearse | Clemson | 6'4 | 216 | 4.62 |
| Miles Killebrew | Southern Utah | 6'2 | 217 | 4.65 |
| Derrick Kindred | TCU | 5'10 | 207 | 4.50 |
| Jordan Lomax | Iowa | 5'10 | 202 | 4.75 |
| Jordan Lucas | Penn State | 6'0 | 201 | -- |
| Harlan Miller | SE Louisiana | 6'0 | 182 | 4.65 |
| Jalen Mills | LSU | 6'0 | 191 | 4.61 |
| Eric Murray | Minnesota | 5'11 | 199 | 4.49 |
| Keanu Neal | Florida | 6'0 | 211 | 4.62 |
| Kevin Peterson | Oklahoma State | 5'10 | 173 | 4.66 |
| Tyvis Powell | Ohio State | 6'3 | 211 | 4.46 |
| Jimmy Pruitt | San Jose State | 6'0 | 198 | 4.73 |
| Jalen Ramsey | Florida State | 6'1 | 209 | 4.41 |
| Will Redmond | Mississippi State | 5'11 | 182 | -- |
| Rashard Robinson | LSU | 6'1 | 171 | 4.49 |
| KeiVarae Russell | Notre Dame | 5'11 | 192 | -- |
| Zack Sanchez | Oklahoma | 5'11 | 185 | -- |
| Kevon Seymour | Southern Cal | 5'11 | 186 | 4.39 |
| Elijah Shumate | Notre Dame | 6'0 | 216 | 4.58 |
| Justin Simmons | Boston College | 6'2 | 202 | 4.61 |
| LeShaun Sims | Southern Utah | 6'0 | 203 | 4.53 |
| Ryan Smith | North Carolina Central | 5'11 | 189 | 4.47 |
| A.J. Stamps | Kentucky | 5'11 | 193 | 4.79 |
| Darian Thompson | Boise State | 6'2 | 208 | 4.69 |
| Cleveland Wallace | San Jose State | 5'11 | 188 | 4.68 |
| D.J. White | Georgia Tech | 5'11 | 193 | 4.49 |
| Brandon Williams | Texas A&M | 5'11 | 197 | 4.37 |
| Daryl Worley | West Virginia | 6'1 | 204 | 4.64 |
| Tavon Young | Temple | 5'9 | 183 | 4.46 |