The San Francisco 49ers signed TE Derek Carrier to a two-year contract extension through the 2017 season.

Carrier (6-4, 241) originally entered the NFL in 2012 as an undrafted free agent with the Oakland Raiders. He spent training camp with Oakland that year, and was later released on August 31. Carrier was then added to the Philadelphia Eagles practice squad on September 11, 2012, and later signed by the Eagles on December 31 following the season. He was released by Philadelphia on August 25, 2013, and subsequently signed to the 49ers practice squad on September. Carrier was promoted to the active roster on November 16, 2013.

Carrier has appeared in 16 games (one start) over the past two seasons with San Francisco. In 2014, he appeared in 11 games (one start) and registered nine receptions for 105 yards. He was placed on the Injured Reserve List on November 27 with a foot injury where he spent the remainder of the season.