The Nationals designated right-hander Andres Machado for assignment Sunday, reports Jesse Dougherty of the Washington Post, although the team has not yet announced the move or a replacement for Machado in the bullpen. Machado, 30, was an oft-used member of the Washington bullpen in 2021-22, appearing in 91 games and pitching to a 3.41 ERA in 95 innings. Those solid bottom-line results came despite pedestrian strikeout and walk rates (18.8% and 9.9%, respectively) and came with a well below-average .261 average on balls in play, contributing to some far less favorable grades from fielding independent metrics (4.56 FIP, 4.45 SIERA).…