Complex sentence: In 2008--09, Dimas joined CD Numancia for his top flight debut, which occurred on 25 September 2008, in a 0--2 loss at RCD Mallorca; he was regularly played as the Soria club eventually were relegated back after just one year.
Split into simpler sentences: In 2008--09 Dimas joined CD Numancia for his top flight debut, which occurred on 25 September 2008 in a 0--2 away loss against RCD Mallorca. He was regularly played as the Soria club eventually were relegated back after just one year.