The New York Yankees have designated right-handed reliever Michael Tonkin for assignment for the fourth time this season, following a stretch of declining performance, particularly after the All-Star break where his ERA soared to 6.98. Manager Aaron Boone described the decision as 'tough,' acknowledging Tonkin's contributions and camaraderie within the team. In a corresponding move, the Yankees have selected the contract of Phil Bickford from Triple-A Scranton/Wilkes-Barre, where he posted a 3.00 ERA in 34 appearances. Bickford, who has previously struggled in the majors with a 14.40 ERA over five games earlier this season, is expected to provide depth in the bullpen. Tonkin's season statistics include a 3.38 ERA across 39 appearances, but inconsistencies led to his current designation. The Yankees now have seven days to trade, release, or assign Tonkin to the minors.