Young with a game off. Ruiz resting. Lefty Stack 1-4 at the top of the Nats lineup.
Starling Marte starting at DH, Alvarez on the bench.
Megill is mainly Fastball (45%), Sinker (22%) and Slider (24%). Sinker and 4 seam are in the 94-95 range, slider 84. Also throws a change and a curve around 88 and 81.
Parker is fastball about 1/2 of the time, with a pretty even mix of sinkers, sliders, and curves. Parker's fastball is around 93, slider and sinker around 85, and curve 81.
Parker throws more balls in the strike zone (55% vs 49%) and a higher % of those strikes draw swings (72% vs 60.5%). They draw comparable % of swings outside the strike zone (around 29%) but Megill gets a little more contact out of the strike zone (60% vs 52.5%).
Megill has not gone longer than 5.1 IP then turns it over to a strong bullpen.
Parker has not gone less than 6 IP and went 8 IP his last start. As for the bullpen, there's a reason we say "duck and cover" in the bullpen thread.