Guzman spent the previous three seasons with the Padres and hit .226 last year with nine homers and 35 RBIs while playing a career-high 126 games. He's competing with Brett Wallace, Jonathan Singleton and Marc Krauss at first base, but he can also play outfield.
"I want to be ready -- whatever position they want me to play, outfield or first," Guzman said. "Whatever they want, I'm here to work hard and try to be in the lineup."
Manager Bo Porter said he'll use the designated hitter during Grapefruit League play to make sure all of the players competing for first base get the appropriate number of at-bats.
Brian McTaggart is a reporter for MLB.com and writes an MLBlog, Tag's Lines. Follow @brianmctaggart on Twitter. This story was not subject to the approval of Major League Baseball or its clubs.