The last Orioles player to win Rookie of the Month was left-hander Brian Matusz in August 2010. Ryan Mountcastle is just the sixth Baltimore player to earn the honor, which began in 2001.
The last Orioles player to win Rookie of the Month was left-hander Brian Matusz in August 2010. Ryan Mountcastle is just the sixth Baltimore player to earn the honor, which began in 2001.