The 2025 season has been full of growing pains for the Nationals, and not just in the standings. With a little more than a month left in the season, Mitchell Parker, Nathaniel Lowe, and Trevor Williams stand out as the biggest disappointments. Mitchell ParkerThe Nationals hoped Mitchell Parker would take a step forward in 2025 after showing promise as a rookie, but he went in the opposite direction. Williams went 3–10 with a 6.21 ERA and 1.54 WHIP across 17 starts before a torn UCL ended his season. Savant grades him below average in nearly every category, illustrating that the Williams deal turned into a letdown in 2025.