Siegel Back On Track, DeFrancesco Back At Home: What To Know For INDYCAR At Toronto

TORONTO — The lone INDYCAR race this season across the border goes green this weekend on the streets of Exhibition Place and Lake Ontario. 

The 2.874-kilometer course (OK, you want it in miles, 1.786-mile) has 11 turns and has been part of a summer festival for 37 years.

The tight course requires precision and also handling a pit road that isn’t straight but instead has some curves. At 90 laps, it is five laps longer this year (noon ET on FOX).

The 27-driver field is the same as it has been for most races in 2025. And that wasn’t a certainty until Thursday morning for the final street course race of the season.

Let's dive into a few things you need to know about this race.

Nolan Siegel Cleared

The Arrow McLaren driver was cleared Thursday to race after missing the event Sunday at Iowa following a hard crash Saturday in Iowa.

"Missing out on Sunday’s race in Iowa was definitely tough, especially after qualifying fifth," Siegel said in a statement. "After a week of rest and recovery, I’m looking forward to being back in the car."

Drivers have accelerometers in their ears, so INDYCAR doctors know how hard the hit is when they evaluate the driver. Any accident that registers 80Gs in any axis or direction is required to return for further evaluation. INDYCAR, like most sports leagues, uses the King-Devick test from the Mayo Clinic among its tools.
INDYCAR's head neurologist, Dr. Bert Vargas, along with INDYCAR medical director Dr. Julia Vaizer, typically does the evaluation to clear a driver to return. Vargas serves as a member of the NFL Head, Neck and Spine Committee and is also a sideline unaffiliated neurotrauma consultant for the NFL.

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