Simplify the following text for a Grade 6 native English-speaking person.
Original: Tranquillo Barnetta ( born 22 May 1985 in St. Gallen ) is a Swiss footballer who plays as a midfielder for Bayer Leverkusen and the Swiss national team .
Simplified: Tranquillo Barnetta ( born 22 May 1985 ) is a Swiss football player . He plays for Bayer Leverkusen and Switzerland national team .