Complex sentence: Mackenzie signed for English League One side Milton Keynes Dons on May 14th 2010, becoming a favourite amongst the Dons' faithful after scoring the winning goal against local rivals Peterborough on 21st March 2011.
Split into simpler sentences: Mackenzie signed for English League One side Milton Keynes Dons on May 14th 2010. MacKenzie became a fans favourite after his fantastic strike against local rivals Peterborough on 21st March 2011.