Twenty-nine cars are expected at Chicagoland Speedway - the most outside of the 33 for the Indianapolis 500 - to be entered for the PEAK Antifreeze& Motor Oil Indy 300 on Aug. 28 at the 1.5-mile oval. Rule 8.1(E)(5)(f) caps the starting field at 28 cars for races other than Indianapolis, Brazil, Toronto and Mid-Ohio based on pit lane space. The rule also was amended for the Honda Indy 200 at Mid-Ohio presented by Westfield Insurance on Aug. 8 to allow for a 27th entry.

In addition to the 24 full-season entries, expected to join the initial practice session at 9:15 a.m. (local time) Aug. 27 are Davey Hamilton in the No. 21 HP de Ferran Dragon Racing car, Graham Rahal in the No. 02 Quick Trim Newman/Haas Racing car, Sarah Fisher in the No. 67 Dollar General car for Sarah Fisher Racing, Ed Carpenter in the No. 20 Fuzzy's Ultra Premium Vodka car for Panther/Vision Racing, and Jay Howard in the No. 66 Service Central car for Sarah Fisher Racing.