Alonso is in the starting lineup for Saturday night's game against the Atlanta Braves.
Alonso has been on the disabled list since June 17 with right wrist tendinitis. He is hitting .210 with five homers and 22 RBIs.
Tommy Medica, who had a career-high four hits while starting at first base on Friday night, is starting in left field on Saturday night.
Rookie Jake Goebbert was optioned to Triple-A El Paso. Goebbert was hitting .250 with one homer and three RBIs in 22 games. Goebbert started nine games at first base and two games in left field since his contract was purchased from El Paso on June 19.