Vickers, who competes full-time in the NNS for JGR, was sidelined recently due to health issues.
Hamlin, driver of the No. 11 Toyota for JGR in the NASCAR Sprint Cup Series, will return to Nationwide competition at Texas Motor Speedway for the Nov. 2 O'Reilly Auto Parts 300. It will be the first start of the Nationwide season for the 32-year-old. He is an 11-time race winner in the series, and has seven top-10 finishes at TMS.
Herring, 26, will finish the season in the No. 20 entry, with starts at Phoenix and Homestead. He has 13 career starts, including four this year with JGR. His best career finish was a fourth-place run at Kentucky last season.
Vickers has also been competing in the Sprint Cup Series for Michael Waltrip Racing this year. The organization announced earlier this week that he would not return to competition this season while he undergoes treatment for a blood clot in his right calf. The 29-year-old missed the bulk of the 2010 season for a similar condition.
MWR officials announced Thursday that Elliott Sadler, Vickers' Nationwide teammate at JGR, would fill in for Vickers in the final four Cup races this year.
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