Injury: Dale Scott Hit in Chin, Leaves Nats-D'Backs Game

For the second time this week, Dale Scott's crew suffered an injury as the crew chief himself was drilled in the face mask by a foul ball during Friday's Nationals vs. Diamondbacks contest. With two out and one on in the bottom of the 4th inning, batter Miguel Montero fouled off a 93 mph Stephen Strasburg offering, the deflection striking plate umpire Scott square in the chin portion of his protective mask before both catchers—Washington's Kurt Suzuki and Arizona's Montero—checked on the injured crew chief. As third base umpire CB Bucknor retreated to the umpire's dressing room to don the plate gear and take over behind the dish, Scott received medical attention from the home club before walking off the field.
» » On Saturday, fill-in Mike Muchlinski was called up to replace Scott.

On Wednesday, crewmate Bill Miller was injured in Oakland, leading to his removal from that specific contest. Triple-A call-up umpire D.J. Reyburn had been summoned to replace Miller for the current Arizona series.

Umpiring Alignment, Nationals at Diamondbacks, 8/10/12, 1st through 4th inning
HP: Dale Scott. 1B: Dan Iassogna. 2B: D.J. Reyburn. 3B: CB Bucknor.

Umpiring Alignment, Nationals at Diamondbacks, 8/10/12, 4th inning through End of Game
HP: CB Bucknor. 1B: Dan Iassogna. 3B: D.J. Reyburn.

Umpiring Alignment, Nationals at Diamondbacks, 8/11/12, Mike Muchlinski replaces Dale Scott
HP: Dan Iassogna. 1B: D.J. Reyburn. 2B: Mike Muchlinski. 3B: CB Bucknor.

Wrap: Nationals at Diamondbacks, 8/10/12
Video: Scott hit in face by foul, likened to "getting punched by Tyson" from broadcaster Mark Grace
News: Umpire Dale Scott injured by foul tip in Phoenix (sic... or "described incorrectly")

OBR Rule 9.02(d):

No umpire may be replaced during a game unless he is injured or becomes ill.