Cleveland's Victor Martinez's pinch-hit appearance after missing time with a pulled hamstring is hardly surprising considering that Martinez is a catcher.
Catchers -- as a general rule -- have the best conditioned hamstrings in baseball because they are constantly squatting. The squatting stretches the hamstring so much and so often that they seldom experience such an injury -- thus making Martinez's baserunning mishap highly unusual.
Expect Martinez to be back to playing regularly before the end of the weekend, or not much after. Ironically, Martinez doesn't even need his hammy to catch, just to run, which is not a big part of his game.