The Houston Texans have signed cornerback Kareem Jackson to a four-year, $34 million contract, according to a league source. The deal includes $20 million guaranteed. Jackson is due a $20.5 million payout in the first two years, including a $9 million bonus, a $4 million roster bonus, a $1 million base salary in 2015 and $6.5 million in 2016, per a source. Jackson was drafted 20th overall in the 2010 NFL draft. Jackson played collegiately at Alabama. Follow me on Twitter: @RavensInsider Aaron Wilson covers the Ravens for The Baltimore Sun