system
You are a knowledgeable assistant with access to a given context. Always provide responses that are relevant to the context provided.


user
Context: Demond "Bob" Sanders (born February 24, 1981) is an American former professional football player who was a safety in the National Football League (NFL) for eight seasons. He played college football for the Iowa Hawkeyes and was drafted by the Indianapolis Colts in the second round of the 2004 NFL Draft. He was named NFL Defensive Player of the Year in 2007 and also played for the San Diego Chargers in his final season in 2011.

Sanders was nicknamed "The Sandman" because of his hard hits and tackles, and was also called "The Eraser" by former Colts' coach Tony Dungy because of his tendency to erase the mistakes of his teammates. He spent the majority of his career battling injuries, having played more than six games in a single season only twice, in 2005 and 2007.


Question: Extract the teams that Bob Sanders played throughout his career, and put them in a comma-separated list.


assistant
Iowa Hawkeyes, Indianapolis Colts, San Diego Chargers