Nationals outfielder Chris Heisey was placed on the disabled list with what the team termed a “right biceps rupture,” per a club announcement. That’s an ominous-sounding injury for the 32-year-old Heisey, and he will indeed undergo an MRI today to learn if the injury requires surgery, as MASNsports.com’s Byron Kerr writes. As Heisey explains the injury, he’s felt on-and-off discomfort in his shoulder and biceps all season but felt an increase in discomfort in a pinch-hitting appearance on Tuesday. “I came in [Wednesday], got some treatment and tried to give it a go.