Morton started well but came unhinged after the rain delay and lost his fourth consecutive start. The right-hander permitted four runs, two earned, and seven hits in 5 1-3 innings.
"I kept grooving fast balls to Steve Pearce and he kept putting good swings on them," Morton lamented.
NOTES: Pittsburgh returns home to face Toronto on Friday night. ... Orioles LHP Troy Patton returned from a 25-game suspension before the second game. Baltimore also activated Machado from the DL, and optioned INF Steve Lombardozzi and RHP Josh Stinson to Triple-A Norfolk. ... The last time Pittsburgh played a doubleheader on the road was in July 2011, at Washington. ... Pirates LHP Wandy Rodriguez (right knee inflammation) allowed three runs and four hits over 3 1-3 innings in a rehabilitation assignment for Double-A Altoona against Erie. ... Baltimore's rainout against Tampa Bay on April 15 was rescheduled as part of a split doubleheader on June 27.