Complex sentence: For his Broadway performance, Gavin has recently been nominated for the 2006 Outer Critics Circle Awards (Outstanding Actor in a Musical) and the 2007 Tony Award for Best Leading Actor in a Musical.
Split into simpler sentences: For his Broadway performance, Gavin has recently been nominated for Outstanding Actor in a Musical at the 2006 Outer Critics Circle Awards. He also earned a nomination for the Tony Award for Best Leading Actor in a Musical.