Complex sentence: On May 23,2008, during a pre-game ceremony in which Biggio received an award for MLB.com's This Year in Baseball 2007 Moment of the Year award for his 3,000th hit on June 28, the Astros announced that they would retire Craig Biggio's jersey.
Split into simpler sentences: On May 23,2008, during a pre-game ceremony in which Biggio received an award for MLB.com's This Year in Baseball 2007 Moment of the Year award for his 3,000th hit. On June 28, the Astros announced that they would retire Craig Biggio's jersey.