Martin, 27, is coming off a down year with the Rangers, but he was their starting center fielder in 2013-14 before losing that spot to Delino DeShields during an injury-plagued 2015 season. Martin hit .219 with 26 runs, 12 doubles, five home runs and 14 stolen bases in 95 games.
Martin underwent surgery on Aug. 26 to remove the hamate bone in his right hand, then appeared in just one game later in the season. Dipoto said Martin checked out 100 percent medically.
"He's coming off a down year, and frankly, that's when you acquire guys," Dipoto said.