San Francisco Giants outfielder Michael Morse is headed to the seven-day disabled list with a concussion suffered when he collided with team-mate Jeff Samardzija during their team's brawl with the Washington Nationals. After Hunter Strickland plunked Nationals outfielder Bryce Harper on the hip with a fastball on Monday, Harper charged the mound. Harper and Strickland exchanged punches and, as players from both teams ran onto the field, Morse and Samardzija ran into each other head-on while coming to Strickland's defence.