Complex sentence: After three and a half seasons with New York, Wynegar became a free agent and re-signed with the Yankees for the 1986 season however, the stress of playing for a high profile team in New York City began to wear on him.
Split into simpler sentences: After three and a half seasons with New York, Wynegar became a free agent and re-signed with the Yankees for the 1986 season. However, the stress of playing for a high profile team in New York City began to wear on him.