Source: Team_Talk
McGinn tonic for Watford manager
The 21-year-old has put pen to paper on a two-and-a-half year deal at Vicarage Road.McGinn made 74 league appearances for St Mirren, scoring seven times including the final goal at their Love Street stadium against Rangers last season.He will not be available for Saturday's trip to Doncaster and will link up with his new team-mates on Monday.