Complex sentence: Prior to signing, Bailey was negotiating an entry-level deal with the Buffalo Sabres, however, the Sabres were unwilling to meet a rookie's demands of playing in the final few games of the team's season, prompting the signing with Toronto.
Split into simpler sentences: Prior to signing, Bailey was negotiating an entry-level deal with the Buffalo Sabres. However, the Sabres were unwilling to meet a rookie's demands of playing in the final few games of the team's season, prompting the signing with Toronto.