The Philadelphia Phillies did a wonderful job of upgrading their roster ahead of the MLB trade deadline on Aug. 3. However, it is the other player acquired along with Arraez, right-handed relief pitcher Caleb Kilian, who earned a superlative from Jim Bowden of The Athletic (subscription required) in his deadline wrap-up. Mandatory Credit: Denny Medley-Imagn Images | IMAGN IMAGES via Reuters ConnectKilian was one of three players who were recognized for being the most underrated relief pitchers traded. Kilian isn’t the only relief pitcher the Phillies added ahead of the deadline. Southpaws have struggled for the Phillies this season on the relief staff.