Bell (side) is not in the lineup Friday against the Marlins, Mark Zuckerman of MASNSports.com reports.
The 28-year-old was scratched from Thursday's starting nine with soreness in his right side, and the results from his MRI have yet to be announced. Bell should be considered day-to-day until the Nationals provide an update. In the meantime, Ryan Zimmerman will receive another start at first base.