Detroit Lions running back Jahvid Best is unlikely to play against the Chicago Bears on Sunday as he continues to recover from his most recent concussion, according to Adam Schefter of ESPN citing a league source. Best, who has dealt with concussions dating back to college, is scheduled to meet with more doctors this week and will undergo further testing, the source said. Best has not played since experiencing concussion-like symptoms following Detroit's Week 6 loss to San Francisco. Source: The Redzone