Minor league game previews -- April 21

Record: (4-9)

Opponent

Gwinnett Braves (7:15 p.m.)

Probable pitchers

Norfolk: Troy Patton (0-2, 11.12 ERA)

Record: (9-4)

Opponent

at Erie SeaWolves (12:05 p.m.)

Probable pitchers

Bowie: Ryohei Tanaka (1-0, 1.50 ERA)

Erie: Duane Below (0-2, 9.64 ERA)

Record: (8-4)

Opponent

at Potomac Nationals (7:03 p.m.)

Probable pitchers

Frederick: Nathan Nery (0-1, 3.38 ERA)

Potomac: Patrick Lehman (0-0, 6.52 ERA)

Record: (8-5)

Opponent

Greensboro Grasshoppers (10:35 a.m.)

Probable pitchers

Delmarva: Jesse Beal (0-1, 4.50 ERA)

Greensboro: Edgar Olmos (1-0, 4.32 ERA)