Mitchell Parker walked 167 batters (4.56 BB/9) in 76 games, 72 starts, and 329 2⁄3 innings of work on the mound in the minors over four seasons, before the Nationals’ 24-year-old, 2020 5th Round pick made his debut in the majors earlier this year.
After he tossed six strong against Miami last week in the nation’s capital, without allowing a walk, Washington’s rookie left-hander had 2.00 BB/9 on the season, in 12 starts and 67 2⁄3 IP as a big league starter.
“It’s hard to win a ballgame when you’re giving up free baserunners,” Parker said after facing the Marlins.