Not even Rosario -- one of the Majors' most productive offensive catchers at .281, 16 home runs and 61 RBIs, entering Friday -- is certain how healthy his hamstring is. That'll be determined when he has to sprint out of the batter's box. After experiencing the cramping during his two-run single in Tuesday night's 7-5 loss to the Padres, Rosario was reduced to running at half-to-three-quarters speed for the rest of the game. Torrealba played Wednesday, and keyed the 5-2 victory by turning an unassisted double play on an unusual rundown.
"My hamstring is good, but I don't know," Rosario said. "We have to wait for that moment and let's see. If I say I can, what if I can't do it. Or if I say I can't do it, then you see me running hard. Then we'll see after the game how I feel."
Rosario said the hamstring is a bigger issue offensively than defensively, even though he is squatting behind the plate. Running delivers more stress to the muscle, he said.
Thomas Harding is a reporter for MLB.com. Read his blog, Hardball in the Rockies, and follow him on Twitter @harding_at_mlb. This story was not subject to the approval of Major League Baseball or its clubs.