Belt's new deal will re-work his salary for this season, meaning he will be under San Francisco's control through the 2021 season. The soon-to-be 28-year old was slated to become a free agent after next year, meaning the new deal covers two arbitration years and four free-agent years.
Belt is the second major homegrown Giant to be locked up recently, joining shortstop Brandon Crawford, who signed a 6-year, $75 million deal in November. The team has also worked out long-term extensions with Hunter Pence (2013), Buster Posey (2013), Madison Bumgarner (2012) and Matt Cain (2012) in recent years.
Belt has been a consistent performer for the Giants since breaking into the majors in 2011, posting a lifetime .272/.349/.456 line with 63 home runs in 560 games. He hit .280/.356/.478 with 18 homers in a career year in 2015.