Complex sentence: He signed a new one-year deal with Bury in June 2006, being released by Bury at the end of the 2006-07 season, but was asked to return to pre-season training to prove his fitness before a decision could be made on his future.
Split into simpler sentences: He signed a new one-year deal with Bury in June 2006. Brass was released by Bury at the end of the 2006-07 season, but was asked to return to pre-season training to prove his fitness before a decision will be made on his future.