No, only the people on first, second or third when the batter commits the final out of an inning.
For example, if there was someone on first and third. The batter flied out to end the inning, he'd be charged with 2 LOB.
In MLB, the abbreviation of "LOB" means "Left on Base." This is only for batters to determine how many baserunners they have left on base after their at-bat.
If the pitcher drops the ball while contacting the rubber or in her motion it is called an illegal pitch. The batters' count will be given a ball and if a runner is on base they are allowed to advance to the next base.
All statistics regarding hits, walks, etc., would go against the pitcher who put him on base. I didn't know there was an official statistic for Left On Base, but if there is, it would probably be credited to the final pitcher of the inning. The Left on Base statistic is not credited to any particular player or pitcher, but is a team statistic found in the official box score of the game.
As of the 2014 season, the Minnesota Twins have 6 left handed batters.
As of the 2014 season, the Arizona Diamondbacks have 7 left handed batters.
As of the 2014 season, the Chicago Cubs have 9 left handed batters.
As of the 2014 season, the Cincinnati Reds have 4 left handed batters.
As of the 2014 season, the Colorado Rockies have 5 left handed batters.
As of the 2014 season, the Detroit Tigers have 5 left handed batters.
As of the 2014 season, the Miami Marlins have 6 left handed batters.
As of the 2014 season, the Oakland Athletics have 7 left handed batters.
As of the 2014 season, the Philadelphia Phillies have 8 left handed batters.