Trumbo, whom the D-backs acquired from the Angels in a three-team deal in December, submitted a $5.85 million figure in the arbitration process, while the D-backs countered with $3.4 million.
Trumbo played at first base and third base and in the outfield during his time with the Angels, but the D-backs see him strictly as a left fielder.
"He's very athletic," D-backs manager Kirk Gibson said. "I think he will be more than adequate out there."
Trumbo has prodigious power -- he smacked 34 homers last season -- and the D-backs are excited about having him take some of the weight off the shoulders of first baseman Paul Goldschmidt.
"We think he's a young guy, he's emerging, he's got a lot more left in his tank," Gibson said. "He's got huge power. He swings and misses probably a little more than anyone would like him to. I think that's something that as he grows, that he'll be better at and he'll have more connectivity. He's going to be a huge guy in our lineup. He's going to have a huge impact on our team. He's got a great personality. He's one of those character guys. That's why we got him."
Steve Gilbert is a reporter for MLB.com. Read his blog, Inside the D-backs, and follow him on Twitter @SteveGilbertMLB. This story was not subject to the approval of Major League Baseball or its clubs.