Washington Nationals first baseman Josh Bell was scratched from Thursday's lineup for undisclosed reasons. Ryan Zimmerman is now starting at first base and is hitting cleanup against Miami Marlins right-hander Cody Poteet. Check back for more updates on why Bell isn't playing on Thursday evening. Consider him day-to-day for now. The 28-year-old switch-hitter is batting just .228/.292/.437 on the season, but he does have 10 home runs and 32 RBI in 197 at-bats for the Nats. Zimmerman, 36, ...