Simplify the following text for a Grade 7 native English-speaking person.
Original: Martin Halsall ( born 25 December 1984 in Blackpool , England ) is a rugby union player for Sale Sharks in the Guinness Premiership .
Simplified: Martin Halsall born 25 December , 1984 in Blackpool , England is a rugby union player for Nottingham R.F.C. in the RFU Championship .