John Harbaugh floats Colin Kaepernick for Ravens

With starter Joe Flacco sidelined for at least a week with a disc issue in his back, the Ravens are exploring signing former San Francisco 49ers quarterback Colin Kaepernick. Following the team’s first full-squad practice of training camp Thursday, Ravens coach John Harbaugh brought up Kaepernick before even being asked about the free-agent quarterback. It’s an…