The New York Yankees, thirsty for bullpen reinforcements, acquired relievers David Bednar, Camilo Doval and Jake Bird in three separate trades Thursday, executing a midseason overhaul they hope will remedy a glaring weakness. Doval was the final of the three pitchers sent to New York — and the last of the seven players the Yankees landed in the seven days leading up to Thursday’s 6 p.m. ET trade deadline. The Yankees sent four minor leaguers to the San Francisco Giants for Doval: catcher Jesus Rodriguez, right-hander Trystan Vrieling, corner infielder Parks Harber and left-hander Carlos De La Rosa.