Complex sentence: Jackson was claimed off waivers by the Astros On November 20,2013, a month later, on December 18,2013, he was traded to the San Diego Padres in exchange for Jesús Guzmán.
Split into simpler sentences: Jackson was claimed off waivers by the Astros on November 20,2013. A month later, on December 18,2013, he was traded to the San Diego Padres in exchange for Jesús Guzmán.