IndyCar Driver Road/Street Power Rankings after 2018 Grand Prix of Portland
By Asher Fair
#10 through #6
. No. 5. Schmidt Peterson Motorsports, Honda. JAMES HINCHCLIFFE. #10
| Last Rank | 8th (-2) |
| Races | 10 |
| Top 10 finishes | 6 |
| Top 5 finishes | 3 |
| Podium finishes | 1 |
| Wins | 0 |
| Average finish | 10.00 |
| Average finish in last five races | 13.20 |
| Most recent finish | 22nd |
| Points in most recent race | 8 |
| Standings position | 8th |
| Points | 224 |
#9. . No. 30. Rahal Letterman Lanigan Racing, Honda. TAKUMA SATO
| Last Rank | 14th (+5) |
| Races | 10 |
| Top 10 finishes | 5 |
| Top 5 finishes | 3 |
| Podium finishes | 1 |
| Wins | 1 |
| Average finish | 11.70 |
| Average finish in last five races | 12.20 |
| Most recent finish | 1st |
| Points in most recent race | 51 |
| Standings position | 11th |
| Points | 218 |
WILL POWER. #8. . No. 12. Team Penske, Chevrolet
| Last Rank | 6th (-2) |
| Races | 10 |
| Top 10 finishes | 6 |
| Top 5 finishes | 4 |
| Podium finishes | 4 |
| Wins | 1 |
| Average finish | 10.80 |
| Average finish in last five races | 13.40 |
| Most recent finish | 21st |
| Points in most recent race | 11 |
| Standings position | 5th |
| Points | 257 |
SEBASTIEN BOURDAIS. #7. . No. 18. Dale Coyne Racing, Honda
| Last Rank | 12th (+5) |
| Races | 10 |
| Top 10 finishes | 5 |
| Top 5 finishes | 4 |
| Podium finishes | 2 |
| Wins | 1 |
| Average finish | 9.80 |
| Average finish in last five races | 12.40 |
| Most recent finish | 3rd |
| Points in most recent race | 35 |
| Standings position | 7th |
| Points | 250 |
. No. 22. Team Penske, Chevrolet. SIMON PAGENAUD. #6
| Last Rank | 9th (+3) |
| Races | 10 |
| Top 10 finishes | 7 |
| Top 5 finishes | 1 |
| Podium finishes | 1 |
| Wins | 0 |
| Average finish | 10.40 |
| Average finish in last five races | 6.60 |
| Most recent finish | 6th |
| Points in most recent race | 28 |
| Standings position | 10th |
| Points | 221 |