The 42-year-old Allmendinger from Los Gatos, California, led a race-high 102 of 201-scheduled laps and became the first Playoff contender to secure a Championship 4 berth by winning the Xfinity Series' Round of 8 opener at Vegas.
The 38-year-old Allgaier from Riverton, Illinois, led a race-high 37 of 128 over-scheduled laps and executed on pit strategy amid two rain delay periods and an overtime shootout to notch his 25th career victory in the Xfinity Series at the Irish Hills.
Kyle Larson headlines a growing list of Cup and Xfinity Series competitors who will be pulling double duty efforts between the ARCA Menards Series West, Xfinity and Cup weekend events in Sonoma, California.
