After taking turns winning the Freedom 100 and Indy Lights championship, Colton Herta and Pato O'Ward will compete with Harding Steinbrenner Racing in 2019.
Only A.J. Foyt owns more Indy car championships than Scott Dixon.
Before 2018, Will Power had never started outside the top five at Sonoma Raceway.
Aiming to win the season finale despite not being in championship contention, Ryan Hunter-Reay put his DHL Honda on the pole at Sonoma.
Josef Newgarden led a trio of Chevrolets in the top five of Practice 2 at Sonoma, including rookie Patricio O'Ward who was third fastest.
Even with his 29-point lead, Scott Dixon has to be careful to keep Alexander Rossi behind him during the final race of 2018.
Connor De Phillippi held off Laurens Vanthoor to bring BMW its second consecutive GTLM victory as the WeatherTech Championship visited Laguna Seca.
Jordan Taylor kept the rest of the Prototype class behind him in qualifying at Laguna Seca with four DPis sweeping the top four after Balance of Performance adjustments for LMP2 cars.
Less than a second separated the GTLM class in qualifying at Laguna Seca with Oliver Gavin setting the fastest lap in the No. 4 Corvette C7.R.
A perfect day and a major gain in the championship slipped away from Alexander Rossi during the first Grand Prix of Portland in 11 years.