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Despite the calls from Rick Hendrick and questions from reporters that started before the beginning of his final full-time season, NASCAR champion Jimmie Johnson has offered the same line throughout 2020 to the skeptics wondering, “Are you sure?”Johnson is sticking by his retirement plans through the pandemic year that included a positive COVID-19 test, missed race and mostly fanless events. Johnson is sure, he’s repeatedly said, and is slated to run a part-time IndyCar schedule with Chip Ganassi Racing next season.“For me and the experience I went through to get to that point to make the anno…
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