"That's our most open competition," manager Jayce Tingler told reporters, according to The San Diego Union-Tribune. "Season happens, injuries happen. The more quality depth that we can build, it just gives us more options for later down the line."
The 32-year-old Dozier, who bats right-handed, could be valuable as a pinch hitter against left-handed pitchers. He has a .270 batting average and .855 OPS against lefties in his career.
He hit .238 with 20 home runs and 50 RBIs in 135 games for the Washington Nationals last season, his first with the team. He made 114 starts for Washington last season, but by the end of the season and in the playoffs, he had lost his starting job to Asdrubal Cabrera.
He was an All-Star with the Minnesota Twins in 2015, when he hit 28 home runs and had 77 RBIs. A season later he set career highs with 42 home runs and 99 RBIs. He also was a run-producer in 2017, finishing with 34 home runs and 93 RBIs and posted a career-best .271 batting average.
The eight-year major league veteran has a .245 average, 192 home runs and 561 RBIs in 1,137 games.