Taijuan Walker versus Matt Harvey in a monster pitching mismatch that should carry with it a much higher price than this. 
Walker always has been a good pitcher. He just hasn't been healthy too much. But he is now and the results are a 2.17 ERA. He carries a 2.08 during his past three starts.

Harvey shouldn't be in a big-league rotation. Much is being made of Harvey pitching against his former team. But that happened back on May 12 at Citi Field. The Mets roughed Harvey up for seven runs on eight hits in 4 1/3 innings. Harvey carries a 3-6 record and 6.62 ERA on the season. 

The Orioles have been one of the worst home teams in the majors losing 20 of 31 games at Camden Yards.