He started in six games for the Galaxy reserve team, logging 513 minutes, but was waived at the end of the season without making a senior start.
Chapman's first senior start came in an 8-0 reverse to Norway in June 2000.
He made his first senior international start on 2 June 2007 against Uruguay.
Hall spent two years in Denmark without making a senior competitive start.
The 18-year-old was given his first senior start against Newells on Sunday but has been a household name for six years.
Further payments could be made if the player makes up to 75 senior starts which would raise the fee to a total of £7.6 million.
He won his first senior start on 29 January 1997, playing in a 2-1 home defeat to Bolton Wanderers.
His first senior start came ten days later at Elland Road, as Leeds United played out a comfortable 3-0 win.
He made his first senior start on 21 August 2011 as Nancy were beaten 1-2 at home by Sochaux.
Her first senior start came the same month in the 3-0 win against Scotland.