"Martin was at the top of our list of players that we had targeted," general manager Doug Wilson told the Sharks website. "We're extremely excited to have him on board."
San Jose traded a first-round pick in the 2016 NHL Draft and forward prospect Sean Kuraly to get Jones, who was traded by the Los Angeles Kings to Boston at the 2015 draft as part of the package for forward Milan Lucic.
"I've never been traded before, so this is all new to me," Jones said Tuesday, according to the San Jose Mercury News. "It's exciting. It's pretty sad when you're leaving a place like L.A. where I formed a lot of good relationships, but I'm looking forward to taking on a bigger responsibility and playing in San Jose."