| Season | League | Apps | Min | Goals | Assists | G+A / 90 | Rating |
|---|---|---|---|---|---|---|---|
| 2015 | Major League Soccer (United States) | 2 | 7 | 0 | 0 | — | — |
| 2015 | USL Championship (United States) | 7 | 518 | 0 | 0 | 0 | — |
| 2016 | USL Championship (United States) | 7 | 270 | 3 | 0 | 1 | — |
| 2017 | USL Championship (United States) | 22 | 1634 | 15 | 3 | 0.99 | — |
| 2018 | Major League Soccer (United States) | 17 | 209 | 1 | 0 | 0.43 | 6.82 |
| 2018 | USL Championship (United States) | 8 | 673 | 6 | 1 | 0.94 | — |
| 2019 | USL Championship (United States) | 5 | 409 | 3 | 0 | 0.66 | — |
| 2019 | Major League Soccer (United States) | 8 | 159 | 1 | 0 | 0.57 | 6.91 |
| 2020 | USL Championship (United States) | 16 | 917 | 8 | 0 | 0.79 | 7.05 |
| 2020/2021 | Premier League (Egypt) | 23 | 1432 | 5 | 2 | 0.44 | — |
| 2022 | USL Championship (United States) | 10 | 335 | 1 | 0 | 0.27 | — |
| 2023 | USL Championship (United States) | 30 | 1897 | 15 | 3 | 0.85 | 7.06 |
| 2024 | USL Championship (United States) | 27 | 1804 | 4 | 1 | 0.25 | 6.86 |
| 2025 | USL Championship (United States) | 21 | 1248 | 6 | 1 | 0.5 | 6.76 |
| 2026 | USL Championship (United States) | 13 | 628 | 1 | 2 | 0.43 | 6.89 |
Domestic league competitions only (SportMonks sub_type='domestic'); national-team, continental and cup competitions are excluded. Classification resolved by league id against the canonical leagues index. G+A/90 computed from minutes actually played.
Figures computed from the GioScore season-stats database · as of 2026-07-28
Player stats against each opponent club
| Team | MP | W | D | L | G | A | ||
|---|---|---|---|---|---|---|---|---|
 Rhode Island | 6 | 2 | 2 | 2 | 1 | 1 | 0 | 0 |
 Louisville City | 5 | 0 | 1 | 4 | 3 | 0 | 1 | 0 |
 Charleston Battery | 5 | 2 | 0 | 3 | 2 | 0 | 1 | 0 |
 Tampa Bay Rowdies | 4 | 0 | 0 | 4 | 0 | 0 | 0 | 0 |
 Miami FC II | 4 | 3 | 0 | 1 | 1 | 0 | 2 | 0 |
 Hartford Athletic | 4 | 1 | 3 | 0 | 2 | 1 | 2 | 0 |
 Loudoun United | 4 | 1 | 2 | 1 | 0 | 0 | 2 | 0 |
 El Paso Locomotive | 4 | 2 | 0 | 2 | 2 | 0 | 1 | 0 |
 Orange County | 3 | 1 | 0 | 2 | 2 | 2 | 1 | 0 |
 Pittsburgh Riverhounds | 3 | 1 | 1 | 1 | 1 | 0 | 1 | 0 |
 North Carolina FC | 3 | 0 | 0 | 3 | 0 | 0 | 1 | 0 |
 Tulsa Roughnecks | 3 | 1 | 2 | 0 | 0 | 0 | 0 | 0 |
 Monterey Bay | 3 | 3 | 0 | 0 | 2 | 0 | 1 | 0 |
 Rio Grande Valley | 2 | 0 | 1 | 1 | 1 | 0 | 0 | 0 |
 Detroit City | 2 | 0 | 1 | 1 | 0 | 0 | 0 | 0 |
 Indy Eleven | 2 | 0 | 1 | 1 | 0 | 0 | 0 | 0 |
 San Antonio | 2 | 0 | 0 | 2 | 0 | 0 | 1 | 0 |
 El Gounah | 2 | 0 | 0 | 2 | 0 | 0 | 0 | 0 |
 Birmingham Legion | 2 | 2 | 0 | 0 | 0 | 0 | 0 | 0 |
 New Mexico United | 2 | 0 | 0 | 2 | 0 | 0 | 0 | 0 |
Player stats against each opponent national team
| Team | MP | W | D | L | G | A | ||
|---|---|---|---|---|---|---|---|---|
 United States | 4 | 0 | 0 | 4 | 0 | 0 | 0 | 0 |
 Canada | 2 | 1 | 0 | 1 | 0 | 0 | 0 | 0 |
 Honduras | 2 | 1 | 1 | 0 | 0 | 0 | 0 | 0 |
 Guatemala | 2 | 1 | 1 | 0 | 0 | 0 | 0 | 0 |
 Panama | 2 | 1 | 0 | 1 | 0 | 0 | 0 | 0 |
 Ecuador | 1 | 0 | 0 | 1 | 0 | 0 | 0 | 0 |
 Mexico | 1 | 0 | 0 | 1 | 0 | 0 | 0 | 0 |
 Peru | 1 | 0 | 0 | 1 | 0 | 0 | 0 | 0 |
 Haiti | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 |
 Grenada | 1 | 1 | 0 | 0 | 1 | 1 | 0 | 0 |
 Cayman Islands | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 |
 British Virgin Islands | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 |
 Nicaragua | 1 | 1 | 0 | 0 | 1 | 0 | 0 | 0 |
 Guadeloupe | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 |
The 2026 USL Championship (United States) line for Romario Williams: 13 appearances (628 minutes), 1 goal, 2 assists — 0.43 goal involvements per 90. His average match rating for that season computes to 6.89.
At his best he averaged 7.06 in 2023, USL Championship (United States); at his worst, 6.76 in 2025.
