The music was quiet. The discussions were hushed. And, at his locker, Jason Grilli stared ahead, not even flinching as passing teammates patted him on the back. The Pirates beat the Washington Nationals, 6-5, but this was a team that was just dealt a crushing loss. Grilli left the game with two outs in the ninth inning, escorted off the field by head trainer Todd Tomczyk as his right arm hung limp. The National League saves leader and first-time All-Star left the game with what the team has initially described as right forearm discomfort. "A definite blow," catcher Russell Martin said. "Hopefully, it's not as severe as it can be." Grilli will be further evaluated today, and often right forearm discomfort is just that. But it often is indicative of something far more severe -- season-ending and career-threatening elbow injuries. His demeanor on the mound and at his locker demonstrates how serious such injuries can turn out to be. "I know he's been through a lot in his career," said fellow reliever Mark Melancon. "Hopefully, [it] is nothing." Grilli, 36, underwent Tommy John surgery after the 2002 season and suffered a catastrophic quad injury above his right knee in 2010 -- an injury that nearly ended his career. He became a feel-good story after the Pirates signed him off the Philadelphia Phillies minor league roster in 2011 and watched him turn into one of the league's most dominant relievers.