By Andrew Holleran NASCAR fans might have been surprised by the face they saw on the pre-race coverage on FOX this afternoon. Longtime NASCAR driver Dale Earnhardt Jr. is appearing on FOX’s pregame coverage of Sunday’s race at Talladega. Earnhardt Jr. typically works for NBC, so fans were likely surprised. FOX executives reached out to NBC for a weekend loan. “It’s not lost on me how rare this is to have your lead analyst appear on another network,” Brad Zager, FOX Sports president of production and operation and executive producer, told The Athletic. “I totally would have understood them sayi…