[4][5] When Jerry Dipoto, the Angels' general manager, resigned during the 2015 season, Klentak was interviewed for the position.

[6] The Philadelphia Phillies, led by MacPhail as their president, interviewed Klentak for their general manager position after the 2015 season.

[7] The Phillies hired Klentak as their general manager, introducing him at a press conference on October 26, 2015.

On January 24, 2022, the Milwaukee Brewers announced that they hired Klentak as a special assistant in the organization.

[8] Klentak's father, George, is an engineer and his mother, Josee, works as a teacher's aide.