IndyCar Driver Power Rankings after 2018 IndyCar Grand Prix of Sonoma
By Asher Fair
#20 through #16
#20. . No. 88. Harding Racing, Chevrolet. GABBY CHAVES
| Last Rank | 19th (-1) |
| Races | 13 |
| Top 10 finishes | 0 |
| Top 5 finishes | 0 |
| Podium finishes | 0 |
| Wins | 0 |
| Average finish | 16.85 |
| Average finish in last five races | 17.20 |
| Most recent finish | 0th |
| Points in most recent race | 0 |
| Standings position | 20th |
| Points | 187 |
#19. . No. 59. Carlin Motorsport, Chevrolet. MAX CHILTON
| Last Rank | 20th (+1) |
| Races | 17 |
| Top 10 finishes | 0 |
| Top 5 finishes | 0 |
| Podium finishes | 0 |
| Wins | 0 |
| Average finish | 17.94 |
| Average finish in last five races | 18.60 |
| Most recent finish | 21st |
| Points in most recent race | 18 |
| Standings position | 19th |
| Points | 223 |
#18. . No. 4. A.J. Foyt Enterprises, Chevrolet. MATHEUS LEIST
| Last Rank | 18th (-) |
| Races | 17 |
| Top 10 finishes | 0 |
| Top 5 finishes | 0 |
| Podium finishes | 0 |
| Wins | 0 |
| Average finish | 16.76 |
| Average finish in last five races | 15.80 |
| Most recent finish | 19th |
| Points in most recent race | 22 |
| Standings position | 18th |
| Points | 253 |
#17. . No. 23. Carlin Motorsport, Chevrolet. CHARLIE KIMBALL
| Last Rank | 15th (-2) |
| Races | 17 |
| Top 10 finishes | 6 |
| Top 5 finishes | 1 |
| Podium finishes | 0 |
| Wins | 0 |
| Average finish | 15.00 |
| Average finish in last five races | 14.60 |
| Most recent finish | 22nd |
| Points in most recent race | 16 |
| Standings position | 17th |
| Points | 287 |
No. 14. A.J. Foyt Enterprises, Chevrolet. TONY KANAAN. #16.
| Last Rank | 17th (+1) |
| Races | 17 |
| Top 10 finishes | 4 |
| Top 5 finishes | 0 |
| Podium finishes | 0 |
| Wins | 0 |
| Average finish | 13.76 |
| Average finish in last five races | 14.20 |
| Most recent finish | 12th |
| Points in most recent race | 36 |
| Standings position | 16th |
| Points | 312 |