Two weeks before quarterback Matt Hasselbeck was due to become an unrestricted free agent, the Indianapolis Colts signed him to a one-year contract extension Thursday.

Financial terms were not disclosed.

Hasselbeck, 39, spent the past two seasons as Andrew Luck’s backup. He saw action in three games in 2013 and four in 2014, all off the bench, and he completed a combined 37 of 56 passes for 431 yards and two touchdowns with one interception.

A sixth-round draft pick of the Green Bay Packers in 1998, Hasselbeck is heading into his 16th NFL season. He spent two seasons backing up Brett Favre with the Packers, then was traded to Seattle in March 2001 and spent the next 10 seasons as the Seahawks’ starting quarterback.

Hasselbeck made the Pro Bowl after the 2003, 2005 and 2007 seasons, and he guided Seattle to the Super Bowl after the 2005 season. He holds numerous Seahawks passing records, including career marks for pass attempts in a game, season and career; completions in a game, season and career; and passing yards in a game, season and career.

In July 2011, Hasselbeck signed a free agent deal with the Titans and started a combined 21 games for Tennessee in 2011 and 2012. He joined the Colts in March 2013.

After news of Hasselbeck’s extension broke, Colts linebacker Jerrell Freeman posted on Twitter, “Welcome back @Hasselbeck aka ‘The Ageless Wonder’…Hasn’t aged one bit!!”