Mercer exits with knee injury
Orioles @ PiratesMarch 27, 2016 | 00:01:18
3/27/16: Jordy Mercer tags up and takes third base on a popup but injures his knee and is lifted for a pinch-runner
3/27/16: Jordy Mercer tags up and takes third base on a popup but injures his knee and is lifted for a pinch-runner