Complex sentence: He spent much of the 2002 NFL season on the taxi squad for the San Francisco 49ers, who signed him on October 1, released him on November 19, signed him on November 27, and re-signed him for 2003 the following February.
Split into simpler sentences: He spent much of the 2002 NFL season on the taxi squad for the San Francisco 49ers. They signed him on October 1, released him on November 19, signed him on November 27, and they re-signed him for 2003 the following February.