TORONTO -- Just when Scott Servais thought his team was nearing full health, the Mariners were dealt another blow. Seattle will be without the services of shortstop Ketel Marte, who was diagnosed with a form of mononucleosis, for an indefinite period.
Marte is expected to be placed on the disabled list. Servais says Shawn O'Malley and recently recalled Luis Sardinas will fill in at short in Marte's absence.
With Marte headed to the DL, the Mariners will recall another pitcher from Triple-A Tacoma on Saturday.
Marte is hitting .273 with 17 doubles and 19 RBIs in 74 games this season.