Sebring Hour 1: Penske Acura out front
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| The start |
The #7 Penske Acura with Ricky Taylor at the wheel leads the 12 Hours of Sebring after 1 hour of running. The #31 Cadillac with Felipe Nasr is not far behind in 2nd while the #90 polesitting Cadillac of Tristan Vautier runs third overall.
The #24 BMW of Jesse Krohn leads the GTLM category over the #67 and #66 Ganassi Ford GTs.
The #15 Lexus with Jack Hawksworth at the wheel leads GTD ahead of the #48 Lamborghini.
An opening-hour crash involving the No. 52 AFS/PR1 Mathiasen Motorsports Ligier JS P217 Gibson of Sebastian Saavedra and the No. 64 Scuderia Corsa Ferrari 488 GT3 of Frankie Montecalvo brought out the first full course caution.
Saavedra appeared to lose control of the car in Turn 17 and clip the Ferrari, which sent Montecalvo into the air and then into the tire barrier. The Ferrari ended up upside down but Montecalvo was able to exit the car under his own power.
Hour 1 Standings
| Pos | PiC | Current Driver | Mfg | Class | Laps | Behind | CL Gap |
| 1 | 1 | Ricky Taylor | #7 ACURA | DPI CP | 27 | –.— | –.— |
| 2 | 2 | Felipe Nasr | #31 CADILLAC | DPI CP | 27 | 1.322 | 1.322 |
| 3 | 3 | Pipo Derani | #22 NISSAN | DPI CP | 27 | 3.415 | 3.415 |
| 4 | 4 | Filipe Albuquerque | #5 CADILLAC | DPI CP | 27 | 5.654 | 5.654 |
| 5 | 5 | Tristan Vautier | #90 CADILLAC | DPI CP | 27 | 7.316 | 7.316 |
| 6 | 6 | Jonathan Bomarito | #55 MAZDA | DPI CP | 27 | 7.854 | 7.854 |
| 7 | 7 | Juan Pablo Montoya | #6 ACURA | DPI CP | 27 | 9.627 | 9.627 |
| 8 | 8 | Renger Van Der Zande | #10 CADILLAC | DPI CP | 27 | 10.001 | 10.001 |
| 9 | 9 | Rene Rast | #77 MAZDA | DPI CP | 27 | 10.602 | 10.602 |
| 10 | 10 | Pato O Ward | #38 ORECA | LMP2 CP | 26 | 1 LAP | 1 LAP |
| 11 | 11 | Paul Di Resta | #32 LIGIER | LMP2 CP | 26 | 1 LAP | 1 LAP |
| 12 | 12 | Stephen Simpson | #99 ORECA | LMP2 CP | 26 | 1 LAP | 1 LAP |
| 13 | 13 | Simon Trummer | #85 ORECA | LMP2 CP | 26 | 1 LAP | 1 LAP |
| 14 | 14 | Jonathan Bennett | #54 ORECA | LMP2 CP | 26 | 1 LAP | 1 LAP |
| 15 | 15 | Sebastian Saavedra | #52 LIGIER | LMP2 CP | 26 | 1 LAP | 1 LAP |
| 16 | 1 | Jesse Krohn | #24 BMW M8 | GTLM | 26 | 1 LAP | –.— |
| 17 | 2 | Richard Westbrook | #67 FORD GTM | GTLM | 26 | 1 LAP | 7.182 |
| 18 | 3 | Joey Hand | #66 FORD GTM | GTLM | 26 | 1 LAP | 8.366 |
| 19 | 4 | James Calado | #62 FERRARI 488 GTE | GTLM | 26 | 1 LAP | 9.279 |
| 20 | 5 | Laurens Vanthoor | #912 PORSCHE 911 RSRM | GTLM | 26 | 1 LAP | 10.350 |
| 21 | 6 | Nick Tandy | #911 PORSCHE 911 RSRM | GTLM | 26 | 1 LAP | 10.835 |
| 22 | 7 | Antonio Garcia | #3 CHEVROLET C7.RM | GTLM | 26 | 1 LAP | 11.191 |
| 23 | 8 | Connor De Phillippi | #25 BMW M8 | GTLM | 26 | 1 LAP | 13.431 |
| 24 | 9 | Tommy Milner | #4 CHEVROLET CORVETTE C7.RM | GTLM | 26 | 1 LAP | 13.882 |
| 25 | 1 | Jack Hawksworth | #15 LEXUS RC F GT3C | GTD | 25 | 2 LAPS | –.— |
| 26 | 2 | Madison Snow | #48 LAMBORGHINI HURACAN GT3C | GTD | 25 | 2 LAPS | 4.340 |
| 27 | 3 | Dominik Baumann | #14 LEXUS RC F GT3C | GTD | 25 | 2 LAPS | 9.483 |
| 28 | 4 | Christopher Mies | #29 AUDI R8 LMS GT3C | GTD | 25 | 2 LAPS | 10.095 |
| 29 | 5 | Katherine Legge | #86 ACURA NSX GT3C | GTD | 24 | 3 LAPS | 1 LAP |
| 30 | 6 | Cooper Macneil | #63 FERRARI 488 GT3C | GTD | 24 | 3 LAPS | 1 LAP |
| 31 | 7 | Christina Nielsen | #58 PORSCHE 911 GT3 RC | GTD | 24 | 3 LAPS | 1 LAP |
| 32 | 8 | Justin Marks | #93 ACURA NSX GT3C | GTD | 24 | 3 LAPS | 1 LAP |
| 33 | 9 | Ben Keating | #33 MERCEDES-AMG GT3C | GTD | 24 | 3 LAPS | 1 LAP |
| 34 | 10 | Kenton Koch | #71 MERCEDES-AMG GT3C | GTD | 24 | 3 LAPS | 1 LAP |
| 35 | 11 | Marc Miller | #36 ACURA NSX GT3C | GTD | 24 | 3 LAPS | 1 LAP |
| 36 | 12 | John Potter | #44 AUDI R8 LMS GT3C | GTD | 24 | 3 LAPS | 1 LAP |
| 37 | 13 | Kenny Habul | #75 MERCEDES-AMG GT3C | GTD | 24 | 3 LAPS | 1 LAP |
| 38 | 14 | Chad Gilsinger | #69 ACURA NSX GT3C | GTD | 24 | 3 LAPS | 1 LAP |
| 39 | 15 | Timothy Pappas | #73 PORSCHE 911 GT3 RC | GTD | 24 | 3 LAPS | 1 LAP |
| 40 | 16 | Don Yount | #96 BMW M6 GT3C | GTD | 24 | 3 LAPS | 1 LAP |
| 41 | 17 | Mathias Lauda | #51 FERRARI 488 GT3C | GTD | 23 | 4 LAPS | 2 LAPS |
| 42 | 18 | Frank Montecalvo | #64 FERRARI 488 GT3C | GTD | 9 | 18 LAPS | 16 LAPS |
| 43 | 16 | Olivier Pla | #2 NISSAN | DPI CP | 0 | –.— | 27 LAPS |