Complex sentence: While trialing with the Galicians, he was invited by the president to attend a match during the 2008--09 season, between the hosts and FC Barcelona; however, after contemplating the decision, he decided to join Mallorca citing better opportunities at the club.
Split into simpler sentences: While trialing with the Galicians, he was invited by the president to attend a match, during the 2008--09 season, between the hosts and FC Barcelona. However, after contemplating the decision, he decided to join Mallorca citing better opportunities at the club.