Jack Sinclair Breaks Out as Key Relief Option for Nationals

Jack Sinclair emerged as a promising bullpen option for the Washington Nationals, posting a 2.45 ERA in 11 outings after adding over 3 MPH of velocity to his fastball. Utilizing a primary fastball-sweeper combination, Sinclair became one of Blake Butera's most trusted late-inning arms down the stretch of the 2026 season.