Mets outfielder Carlos Beltran served as a designated hitter in an extended spring training game on Friday.
Beltran had six at-bats, getting two singles in Port St. Lucie.
A team official said it was a step in his rehabilitation and that Beltran did "nothing crazy" as far as baserunning.
Beltran, 33, underwent Jan. 13 arthroscopic surgery on his arthritic right knee.
Beltran Plays In Port St. Lucie