Atlanta selected Tellez's contract from Triple-A Gwinnett on Wednesday.
Atlanta placed star outfielder Ronald Acuna (hamstring) on the 10-day injured list, and as a result Tellez, an eight-year big-league veteran, will reach the majors for the first time in 2026. Though the 31-year-old Tellez showed during his time at Gwinnett that he can still hit for power (.483 slugging percentage) and get on base at a steady clip, he likely won't have a path to regular playing time while he's up with Atlanta. Unless Atlanta shows a willingness to use Dominic Smith in the corner outfield while Acuna is on the shelf, Tellez will likely be limited to a pinch-hitting role while Smith and Matt Olson are ahead of him on the depth chart at designated hitter and first base, respectively.