The Steelers last month offered the contract to Blake, one of three restricted free agents to whom they tendered one-year deals.
Blake could have signed with another team, but the Steelers had the right to match any offer made to the former undrafted free agent in order to retain him.
Blake emerged as more than just a special-teams player in his second season with the Steelers. The 5-foot-9. 198-pound cornerback started one game last season and had significant playing time as a nickelback after Cortez Allen struggled and eventually ended up on injured reserve.
Blake recorded 36 tackles in 2014 – 14 of the stops came in the Steelers’ final two regular-season games -- and made his first NFL interception.
He also made a big play in the game that delivered the Steelers’ first AFC North title since 2010.
Blake forced a fumble after an A.J. Green catch and recovered the loose ball. The turnover thwarted a late rally attempt by the Cincinnati Bengals and the Steelers beat their AFC North rival 27-17 to cap an 11-5 season.
Blake’s deal already counted against the salary cap because it was a tender offer, so the Steelers are still about $6.5 million under the cap.