Complex sentence: After being released by the team following the 1977 season, Rojas would spend 1978 on the sidelines and despite signing with the Chicago Cubs on September 1, he would not get into a game with the team and would retire from baseball.
Split into simpler sentences: After being released by the team after the 1977 season, Rojas spent 1978 on the sidelines. Despite signing with the Chicago Cubs on September 1, he did not get into a game with the team and retired from baseball.