Nunez, ranked as the club's No. 5 prospect by MLBPipeline.com, is quick to credit longtime teammate Matt Olson for the assist. Olson, called up with Nunez for his big league debut on Monday, has played with Nunez at essentially every level, beginning with the Arizona Rookie League in 2012. They've since been teammates at both Class A levels, Beloit and Class A Advanced Stockton, as well as at Double-A Midland, Triple-A Nashville and now the Majors.
"It seems like I've played every single game with him," Olson said. "I always joke around and tell people he's my Latin brother."
Nunez and Olson won't play every day, but they'll get their at-bats, manager Bob Melvin said. Nunez is likely to see most of them at DH, with Ryon Healy sitting comfy at third base.
"We like what Healy's done so far," Melvin said. "Ryon has proven to be an everyday guy who wants to be out there every day and is doing a nice job with it, so we're still getting a long look at him.
"We have enough guys here that we're looking at, but more than anything we want to give [Olson and Nunez] that experience of being here and being around this team. They're part of the group of guys here that have come up together."
Looking around the room on Tuesday, Nunez said, "You kind of feel like you're home. I've been playing with these guys since I signed, so it's good to be with these guys here."
Nunez arrived early to work with infield coach Ron Washington. His offense is thought to be ahead of his defense at third, though Nunez has recently expanded his value by clocking time in left field with Nashville, noting he's open to any position that offers him an opportunity. At the plate, he hit 23 home runs, plus five more during the postseason.
"He's always been the same player since we started," Olson said. "He's a polished hitter."
Nunez hopes to have his family on hand in Oakland when the A's return home next week. His father, mother and sister, who traveled from Venezuela to stay with him in Nashville for a month this season, are all expected to make the trip to the Bay Area.
"It should be exciting," Nunez said.